Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f3f9afe08f09c6…

MALICIOUS

PDF

39.0 KB Created: 2020-08-11 06:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13c97f0d754a4479ba8cda0f892cf4d9 SHA-1: 38c9f4f0233eff36bf23f7e89fe2160d626d972e SHA-256: 70f3f9afe08f09c6cdace94d2b3b9d63aca10b070d90900bb9d7f0dd34ac3193
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains a lure for an advance-fee scam, presenting fake 'Burger King coupons' and directing the user to a malicious URL (https://ttraff.ru/pify?keyword=burger+king+coupons+oktober+pdf). The document also contains a large number of links to other PDFs, suggesting it is part of a link farm designed to improve SEO for malicious content. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.ru/pify?keyword=burger+king+coupons+oktober+pdf
    • http://files.buddhacbmr.org/uploads/1/3/1/3/131398406/pojivon_feneloxijaxuruj.pdf
    • http://files.carlosvouking.com/uploads/1/3/1/4/131453086/522437.pdf
    • http://files.werleaders.com/uploads/1/3/1/4/131453950/pojoxojakidug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9468/8419/files/job_interview_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/6860/5095/files/jeppesen_private_pilot_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5953/files/89819990452.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/84063449481.pdf
    • https://cdn.shopify.com/s/files/1/0437/8060/4065/files/vififerewozewukumoba.pdf
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/zitomupajosumozejomogiwo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4633/7693/files/45520093144.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7461/files/55224866035.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4685/files/sifife.pdf
    • https://cdn.shopify.com/s/files/1/0428/5274/5375/files/32644736059.pdf
    • https://cdn.shopify.com/s/files/1/0440/6237/6088/files/zowezumifikaxenewafufo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005916.bin
39bc68f88b7c1eca076959fc03c879c12bf85866731d15d13dc7d157df2dfc67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5916 5332 bytes
font_01_sfnt_off00006b47.bin
d7dcfac1266c2bc83b02d0b84818732cf3533ab288d5fa94f383648b68407aa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B47 10572 bytes

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