Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc7fc37bb06e3d82…

MALICIOUS

PDF

32.8 KB Created: 2020-11-01 07:56:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 61e35556f768772cb650e44d9c7a9326 SHA-1: da14ac0a91ed3d993a36adea4b8a1c7304c42e0a SHA-256: fc7fc37bb06e3d82117303abe1b37ebb27c2f51ea498ecc41f6506ab64ebff5a
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file 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 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=black+dog+tabs+bass In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408588/normal_5f949a11671c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382192/normal_5f8f5b910e58d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370762/normal_5f8b66433b0fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/693a73fc-b373-4135-a60c-efcd4a2705a1/gijefeletil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0522/3327/files/nba_live_2020_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/957e3ea3-a385-40ed-b512-40985389eb50/76973868480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8200/7199/files/10704649952.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/vudixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f552179-e2ee-43c7-98e5-2dccf6c7dd3a/7160938613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/1658/2854/files/psiphon_pro_unlimited_latest_apk.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4483 5264 bytes
SHA-256: 35ac6291788fb6c5447f46d9ed6193a317433b018ee10bbd248f3187d8c87ab3
font_01_sfnt_off0000567d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x567D 9460 bytes
SHA-256: 7f8475fadc80233838aa4bde0e766f415d1c0725dc8bde4d4e95dba9e926986d

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