Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd506c752c3b18c4…

MALICIOUS

PDF

39.6 KB Created: 2020-11-03 08:11:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 340afe012937fc2e55bf1d4490cfc467 SHA-1: 0b0607d73a53aeb090299d0167a52af3de8bca1e SHA-256: cd506c752c3b18c46dd442233d710ff4a3a264ba8ac97eac6c8f13106807a377
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, one of which is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Fedex freight employee handbook 2019' and a URL, suggesting a phishing lure. The presence of numerous other PDF links further indicates a link farm or redirection strategy. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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://gettraff.ru/aws?keyword=fedex+freight+employee+handbook+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4455684/normal_5fa092e7c1c91.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/70abf18b-ca5e-4d06-a2ee-8bf415533eaf/brz_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2469/7509/files/pidesajegoluxakudam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4615/6447/files/move_deleter_in_diamond.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56ee9a50-38f7-4d50-9ce6-0e1bc16858c0/tatudujakonofike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1307/0238/files/69291782465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c39083fb-76e1-458c-b7d4-523d6b76faa8/zedesofusimajetebose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51ca2800-1b23-4217-b512-8d48e5f034b2/73822124677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6596/6231/files/91450083792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4032/0931/files/quartz_hill_elementary_mascot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6488/5397/files/naruto_shippuden_mod_apk_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a4754dc-b83e-429b-8b52-2d028fbc81d7/nonuroge.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_off00005970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5970 6088 bytes
SHA-256: 0e598993b448a670f319aed9dd5445cc2c5c8b24df26ed45f481b2b23cc1cb27
font_01_sfnt_off00006e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E11 10484 bytes
SHA-256: 9f698a50511b4b4c3cc6b8e519c8107e87e8cb5062633593bbddd3f21be3d343

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