Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce64b8b52e4e55f…

MALICIOUS

PDF

44.0 KB Created: 2020-08-03 14:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f75692b0f1d525f07c96c914871a78f SHA-1: f2221228503c811ab0e6c229289a97528f2bc5db SHA-256: 6ce64b8b52e4e55fb9c8b18a396686427b1a8d9dd07bf362554b556e940855ba
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector (ttraff.cc), and a large number of links to other PDFs hosted on Shopify. The document body text, though garbled, contains phrases like 'Primed to perform free pdf' and references wkhtmltopdf, suggesting a lure to download or access further content. The presence of multiple PDF links and a malicious redirector indicates a phishing or malware distribution attempt.

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.cc/pify?keyword=primed+to+perform+free+pdf
    • http://files.ladstravelbible.com/uploads/1/3/1/4/131453214/julokuzoxuda_xipiwolipog_ridagusez.pdf
    • http://files.araiacademy.com/uploads/1/3/1/6/131606673/povitujoveb.pdf
    • http://files.fishersproduce.com/uploads/1/3/0/7/130740148/wanomadi.pdf
    • http://files.counsellingandpsychotherapy.com.au/uploads/1/3/1/4/131406352/9657312.pdf
    • http://files.lilliemaechocolates.com/uploads/1/3/1/4/131438420/60d4eae93.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9183/6566/files/18190565609.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/56325115608.pdf
    • https://cdn.shopify.com/s/files/1/0428/1961/6935/files/98703947721.pdf
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/2166-_8-_1.pdf
    • https://cdn.shopify.com/s/files/1/0441/0785/8072/files/watubazibon.pdf
    • https://cdn.shopify.com/s/files/1/0440/7338/6136/files/jquery_resizing_image.pdf
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/37960792500.pdf
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/manaxuganopenu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8196/5474/files/12003988241.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/kolubudadomotogan.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/55903703200.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_off000070e7.bin
e2464b0503ad201a506a16268dfc89ffdf1f752c68cd7c37e6e341f30ec12a37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E7 4768 bytes
font_01_sfnt_off00008107.bin
8f31a17d68ce934aefd11d1298cc51fbf56d40468e85dacf42cd8077c8627d73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8107 9988 bytes

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