Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed545767ce89bda…

MALICIOUS

PDF

43.1 KB Created: 2020-11-01 16:29:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b5214cc86410eb731e69eb6bac2916a SHA-1: 3b3c4bb3ae9af1563c80cb1fd5ec9b0d216694f3 SHA-256: 7ed545767ce89bdaf3e0ef7712393a08f2ef79b802c1a088d32496b2f2ad785f
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://gettraff.ru/123?keyword=gfs+guitar+kit'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL embedded within the document strongly suggests an attempt to lure the user to a harmful site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://gettraff.ru/123?keyword=gfs+guitar+kit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wilugugo/27481639662.pdf
    • https://s3.amazonaws.com/wonoti/wumujexalasoboduse.pdf
    • https://s3.amazonaws.com/suximawo/bivirifazovubanigo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8725/0087/files/vagameboditidusewi.pdf
    • https://uploads.strikinglycdn.com/files/4075b212-1019-4506-a581-7463b0559430/82829078384.pdf
    • https://s3.amazonaws.com/zazelujeju/41344190077.pdf
    • https://cdn.shopify.com/s/files/1/0433/8650/3326/files/53686960561.pdf
    • https://uploads.strikinglycdn.com/files/105ab946-dafe-4092-a439-94581851f544/fifujutefigovorupo.pdf
    • https://s3.amazonaws.com/jakujakula/mathematics_for_economics_and_finance_anthony_biggs.pdf
    • https://s3.amazonaws.com/henghuili-files2/standard_kitchen_cabinet_sizes_chart.pdf
    • https://uploads.strikinglycdn.com/files/bda08ee6-79c3-4706-b3c4-7483e68f26b6/36382825880.pdf
    • https://s3.amazonaws.com/fotojipifuzitul/kowakikisodi.pdf
    • https://uploads.strikinglycdn.com/files/ac51aacc-2c2d-4862-b4e3-18110b6b9356/how_would_you_characterize_a_companys_accounts_receivable_account.pdf
    • https://uploads.strikinglycdn.com/files/447fedd7-9c53-4f8e-a6ec-38265fc4d1ca/falinisesulupafagegapa.pdf
    • https://uploads.strikinglycdn.com/files/65e886c6-08a3-4a2a-bda9-9d7404b84516/lilopumavujo.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_off00006b10.bin
525ec67b1cd138231095474fbf35189106c7ee5d2ae4340206d46f320ccb4c7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B10 5000 bytes
font_01_sfnt_off00007c2e.bin
530efe0795c1c1cc584ab4ecd798e4d38fce40df08c0348c6cbebe7aa11604d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2E 10560 bytes