Malicious PDF — malware analysis report

Static analysis result for SHA-256 499ffc153f59dc5c…

MALICIOUS

PDF

51.6 KB Created: 2020-10-31 18:30:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ee69b5fa81152d6bb158a82d5a1a3399 SHA-1: 24641ecf135823447910a776181fb227ab5bb024 SHA-256: 499ffc153f59dc5c228c8e52c63f588467206ea49400869f4fb615e405866660
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.club/123?keyword=maria+briseno+sacramento In PDF document text
    • https://vekejuritikoj.weebly.com/uploads/1/3/1/8/131857631/9460805.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/riburu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388282/normal_5f9744b51e0e4.pdfIn PDF document text
    • https://jopomewimedadi.weebly.com/uploads/1/3/4/4/134465277/zakakogigixejarokeve.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/d0e9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380890/normal_5f911ef475ce5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f31fb3d6-a8d7-4963-b54e-9e395fa037d2/pipekuvavejisuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/1446/0856/files/56166370291.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/command_prompt_tricks_to_hack_wifi.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/finding_limits_graphically_and_numerically_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/73688189823.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/noxopotatorumizoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/732ecb28-582a-4a53-8c1f-397b79814644/bafaw.pdfIn PDF document text
    • https://s3.amazonaws.com/tagorarib/the_last_lecture_summary_chapter_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/2951/8243/files/the_great_fossil_find_worksheet_answers.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68BB 4848 bytes
SHA-256: acdf3674ac680e85d7e7d705f9d414a3137f9df814b1a0ddc49e209fca60bc9c
font_01_sfnt_off00007914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7914 10776 bytes
SHA-256: f3bd1b07983658691af9221376428a10628266978712c76641dc886d1a770389
font_02_sfnt_off00009d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D55 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e
font_03_sfnt_off0000b285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB285 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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