Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af639f3de26be26…

MALICIOUS

PDF

78.7 KB Created: 2020-08-28 08:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3133b7b3e9ad03528a5d7f2e8f798754 SHA-1: 5234ce99424d0cc021925d60264506849ee360e3 SHA-256: 4af639f3de26be2611a15b716537e913bed96f78ade23f201f7af6bb6d60c969
154 Risk Score

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/pify?keyword=manual+de+servicio+lavadora+whirlpoo In PDF document text
    • http://files.protectgladewatershed.com/uploads/1/3/2/3/132303312/xixojatexozufiz.pdfIn PDF document text
    • http://files.marychristineparks.com/uploads/1/3/1/8/131872238/1862033.pdfIn PDF document text
    • http://files.northshorereaching.ca/uploads/1/3/0/7/130775737/pisojagupeze.pdfIn PDF document text
    • http://files.bluvirginhair.com/uploads/1/3/1/4/131406885/gizotek_xumokewivadar.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/1/0434/9450/6661/files/24891020745.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2611/0885/files/gefudukuwam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/bobimaxitoridekikad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5195/8947/files/will_you_come_and_follow_me_sheet_mu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5856/1175/files/62106539022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/xufusalabolisunekuzezeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9799/5944/files/algebraic_expression_problems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/wifinazexowefawupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/7146/5630/files/rakaxagif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5467/7668/files/askep_kasus_bblr.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD930 5320 bytes
SHA-256: 771bf01934c378b75b95953eb8a91f6b423c6d75640e72d7db06aee5c2f7ae41
font_01_sfnt_off0000eb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB55 13100 bytes
SHA-256: 6c8e354c2aee70fb738fcd0ebd6ac32473160c1841ddbf74ce7d4b818805598f
font_02_sfnt_off000115d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D0 16272 bytes
SHA-256: ed91397d32f09f10118484870bf01b3266fb4f14db12ca3fc6cf86c0a014cc16

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