Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bc249aee9344288…

MALICIOUS

PDF

63.7 KB Created: 2020-10-18 19:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 57a1152a6909c96750b0191ed6174905 SHA-1: 8ed98fcd7ed089e64337b9cc0075f9f6293c0fe1 SHA-256: 1bc249aee93442887eac0fc3fcede7585fbc7638d2820202d75bcc777865d9cc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests the document is part of a link farm, likely to improve search engine ranking for malicious content. The primary malicious URL identified is https://ttraff.me/123?keyword=pneumonia+por+staphylococcus+aureus+pdf, which is likely used to redirect users to a further malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ttraff.me/123?keyword=pneumonia+por+staphylococcus+aureus+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371003/normal_5f8bdf3008580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5f89612f34592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380383/normal_5f8b55448cb5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5f8b1517892da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369762/normal_5f899975c5d98.pdfIn PDF document text
    • https://kiseridebajesa.weebly.com/uploads/1/3/1/4/131408791/4586906.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/c4c5d2437f97.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3100/2269/files/sofexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/4300/4826/files/han_eun-_jung.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9503/8888/files/gogibikikajatanew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2991/4012/files/soulsilver_game_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8712/5910/files/memphis_grizzlies_jersey_history.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5305/6149/files/zogelebabititumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8249/6173/files/50934580552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4258/4760/files/robot_unicorn_attack_heavy_metal_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8979/8317/files/fupupuwirarubukuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9712/8088/files/43310534564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbcd622d-8cce-4425-b95a-385ba8635282/diwiwusazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88bd5b86-7e82-4fbf-b0f4-c05f14d7b3b2/kekokotarobakazunu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA349 5496 bytes
SHA-256: dbe0423fce0a86336aad3cff6e1df69c23c246b3d53a2b27ea3310eb54ef6988
font_01_sfnt_off0000b5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5D3 10940 bytes
SHA-256: 29cc8420d308c9f9af523c7d0a55235f6618c2a86bf1d63e4ba204684aa46fb4
font_02_sfnt_off0000db38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB38 16272 bytes
SHA-256: dc85c5c961e6b06edadcf2a5947f3d69ce95774a8491f7f6a2adeb70290b8c1f

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