Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0ced5f5b326d73…

MALICIOUS

PDF

41.9 KB Created: 2020-07-29 03:19:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e0148a55f010f6abff4a62bf6c27a86 SHA-1: 80b07844154625d0a9eb35457194ca474764ccc6 SHA-256: ba0ced5f5b326d735e0577ea777426ccfbd51148c935b31190a531387543201e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This indicates the document's primary purpose is to lure users to a potentially harmful site. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute malicious content. No scripts were extracted, but the presence of a malicious redirector is sufficient evidence of a phishing or redirection attack.

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://ttraff.com/pify?keyword=reader%25E2%2580%2599+s+digest+complete+guide+to+sewing
    • http://files.ladecharter.org/uploads/1/3/2/7/132712006/171125f1.pdf
    • http://files.centerforwomenfaithandleadership.org/uploads/1/3/0/7/130776602/tovirin.pdf
    • http://files.premiumsteaksandseafood.com/uploads/1/3/1/3/131398401/05c62e5a598.pdf
    • http://files.rickmolloyart.com/uploads/1/3/2/6/132682790/kisifitol_jowoxibo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/birizakidunupujudexi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0380/3808/files/dumewepepuru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xazome.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/78768485083.pdf
    • https://cdn.shopify.com/s/files/1/0436/0821/1619/files/bumabetofasa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3848/2332/files/96468717304.pdf
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/xajadavumavatovata.pdf
    • https://cdn.shopify.com/s/files/1/0433/8837/1107/files/94108100496.pdf
    • https://cdn.shopify.com/s/files/1/0437/2584/8727/files/bajovetutekisepuge.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2500557594.pdf
    • https://cdn.shopify.com/s/files/1/0428/1345/6550/files/zefajikuni.pdf
    • https://cdn.shopify.com/s/files/1/0433/9272/9246/files/kupekakolajixan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55166802931.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/
    • https://cdn.shopify.com/s/files/1/0436/08

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064c1.bin
456059e5c838b45b94ba2bf1f0b077a11a2a5f4cf737c949d7f1191666db5227		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C1 5428 bytes
font_01_sfnt_off00007734.bin
4d825723685d4062bfa59aaf013db3b0749ba5a4fd9f788176aaa1cfefb21c5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7734 9708 bytes

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