Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ad61577ab506b8…

MALICIOUS

PDF

65.8 KB Created: 2020-10-19 11:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6d3817b222a3f56be43273f81f7c5e15 SHA-1: 9ef7e55d728122202479d8ee141ebd9133122731 SHA-256: e9ad61577ab506b812a525a93dc6d07cb6b4b8321848f015a577fab7ddca83e6
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to known malicious redirector infrastructure. The document body, though partially corrupted, contains a URL that appears to be part of a link farm designed to attract traffic. This suggests a phishing or traffic redirection scheme, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/123?keyword=sony+mhc+m80d+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368782/normal_5f897b56d737a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f8c54824467f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_5f8c135ae9caa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380857/normal_5f8b9ce84699d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374715/normal_5f8a186f9a380.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378410/normal_5f8b2d15493cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f889a7fd5537.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f875f1519f1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5f8975fa0f2ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369775/normal_5f8943a945696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382961/normal_5f8b9e73432b8.pdfIn PDF document text
    • https://gowiwoniba.weebly.com/uploads/1/3/1/8/131857243/1865409.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/405102.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/1cf22.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/994144.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/9520944.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/8888528.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/wuwolazavididar.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/nukexifepejisox.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/vemewo_kewevosaded_jujimawesaxa_bojonaxax.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/417ca63fad645e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.orgThisIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/771c2d33-4cea-4072-8062-397fde713e1f/35167083846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61baa081-73a0-4ffd-bc77-f416fd62ddc5/migufajitibizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67d8723d-0567-40ca-b882-3014f686fdc7/vudasamokanofesevokip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7103d408-3fc4-47fb-9aa3-07debcfa5178/public_finance_and_public_policy_4th.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://scripts.sil.org/In PDF document text
    • http://scripts.sil.org/OFLAbyssinicaIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E25 3980 bytes
SHA-256: 41a3bc90c99e4186908cfa05f552edc5408e1907d67d176fb753de1774242952
font_01_sfnt_off00006c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C39 5080 bytes
SHA-256: 530b61c0ba7c71c9ab0621d9934d7be01e1c7eba2d4b51a14d86a71d5a58a65b
font_02_sfnt_off00007d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3A 20720 bytes
SHA-256: 46b71a431366fc0401e39202db84d4e7218e3135a4dca8454dceb45e18ec33a3
font_03_sfnt_off00009c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C56 13260 bytes
SHA-256: 45a1a6276d76144f07c8171d8cd3c7d55b0ae77600f37d7637ff3b94c60c109b
font_04_sfnt_off0000c6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F5 16416 bytes
SHA-256: 4bf7462e787791ee30cced4e4a0065977ba460b587ec5e4d0bf31a1282398818
font_05_sfnt_off0000dcea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEA 2948 bytes
SHA-256: ab7ad8940d26f6e84b4ad584a6c6af8b5ee4db23a14361adea8171b43952fe46
font_06_sfnt_off0000e846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE846 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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