Malicious PDF — malware analysis report

Static analysis result for SHA-256 6511d55110df7f63…

MALICIOUS

PDF

47.2 KB Created: 2020-08-23 19:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a95b41430cfae5517a312552248ebb9 SHA-1: d54b0071a7beb5d439b99845fbf5562cb686fe4b SHA-256: 6511d55110df7f63d60915e232ec70fe7ecaa1b840696f5ea28d11f34e38e091
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to benign Shopify URLs, but also includes a critical link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=acidosis+lactica+por+metformina'. This suggests the document is part of a link farm or SEO poisoning campaign, aiming to drive traffic to malicious infrastructure. No scripts were extracted, but the presence of malicious links is sufficient evidence for this assessment.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=acidosis+lactica+por+metformina
    • http://files.savajrsvolleyball.com/uploads/1/3/1/3/131380627/ridilevawupap.pdf
    • http://files.seejaysrepairs.com/uploads/1/3/1/3/131384401/sejetururef_zuxod.pdf
    • http://files.canisteowesleyanchurch.com/uploads/1/3/0/9/130968984/0bf7b4.pdf
    • http://xobizuz.kiarashmotarjemi.com/uploads/1/3/1/8/131855997/wifaruvat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/3785/9733/files/69144095237.pdf
    • https://cdn.shopify.com/s/files/1/0434/0082/2934/files/92244924980.pdf
    • https://cdn.shopify.com/s/files/1/0434/5013/8784/files/bodylastics_workout.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6482/files/zejufeso.pdf
    • https://cdn.shopify.com/s/files/1/0429/4397/1484/files/jboss_application_server_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/6091/2537/files/basabizaxugi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1615/files/automatic_control_engineering_francis_h_raven.pdf
    • https://cdn.shopify.com/s/files/1/0440/6640/6552/files/19382303833.pdf
    • https://cdn.shopify.com/s/files/1/0437/7486/9665/files/ancient_greek_grammar_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/2813/5592/files/sisito.pdf
    • https://cdn.shopify.com/s/files/1/0437/2499/6773/files/64640010054.pdf
    • https://cdn.shopify.com/s/files/1/0438/4571/4077/files/nokej.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dfe.bin
c681bde543079a550ca5a985aa37b0c437920b189c0535bdceeb43e44d330b1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFE 5076 bytes
font_01_sfnt_off00007f18.bin
42c96fd44e1d5e3586bdff4a0270b0ce741d7362eb1d19ee03ae5185e055cbea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F18 10140 bytes
font_02_sfnt_off0000a1c7.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1C7 4324 bytes

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