Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb8a2fec1c31933…

MALICIOUS

PDF

44.9 KB Created: 2020-08-24 04:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0fd1ea077de69a437aacdf16739d3b0 SHA-1: c675c6e98dc88f63a89e92ee651c353d8987208b SHA-256: bbb8a2fec1c3193310cc39d6efafb4b25a64871825268a800d1629aac955dab3
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though partially corrupted, includes the same URL, suggesting it is the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning tactic to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.
  • 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.
  • 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=good+android+games+for+couples
    • http://veferajor.tskjesusfreak.com/uploads/1/3/2/6/132680835/noxezafipewodabofome.pdf
    • http://sotazuj.jaclynruth.com/uploads/1/3/1/6/131606289/5116045.pdf
    • http://files.yourlocalhandyman.org/uploads/1/3/1/4/131453174/3664698.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1693/files/ginuvedirutawusibosekavu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3549/1490/files/7816613856.pdf
    • https://cdn.shopify.com/s/files/1/0461/9812/8791/files/18248796658.pdf
    • https://cdn.shopify.com/s/files/1/0439/6787/3182/files/revit_structure_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0438/0318/1218/files/adjective_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/9352/2587/files/lufukimabo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/3488962021.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3881/files/jikasusokapenifitaxexi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0407/5933/files/77735712876.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4216/files/bagudojowududun.pdf
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/9952205083.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063b2.bin
66c359991ffb4a6427ba670121c4d33c5e483c5c0a63623e63dcc1e8807badbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B2 5308 bytes
font_01_sfnt_off000075ad.bin
312cada77eff2db5f89433070ff0a9ffcdec7465bc3617154bdeba012ad2c315		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75AD 10260 bytes
font_02_sfnt_off000098d5.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98D5 4324 bytes

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