Malicious PDF — malware analysis report

Static analysis result for SHA-256 e642b605e8b55cd2…

MALICIOUS

PDF

42.5 KB Created: 2020-08-08 19:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34d131afb25d4300df0e5c98b4fae20d SHA-1: 0dd05264eafec30f1cdda0d5bdc2f03a4b810558 SHA-256: e642b605e8b55cd28d5f02d7d9ac4bfb39e2ff54cac4e0eaaadc30a263bd2f26
152 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body text, though partially obfuscated, includes the phrase 'zoology books pdf download' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a large number of external PDF links further indicates a link farm or SEO poisoning attempt, likely to drive traffic to malicious sites.

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=zoology+books+pdf+download
    • http://rinar.littlefurfriends.com/uploads/1/3/1/6/131606407/7198467.pdf
    • http://files.millerunitedmethodistchurch.com/uploads/1/3/1/0/131070030/5370156.pdf
    • http://tazezud.cathynepomnyashchy.com/uploads/1/3/1/4/131453329/goxotesevejok_zazijobadaxilum_xinix_kuluzano.pdf
    • http://files.highdesertfilmlocationsla.com/uploads/1/3/1/4/131409090/dufeduroxuj.pdf
    • https://cdn.shopify.com/s/files/1/0440/5172/6501/files/69683314457.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/kabifupitozokaravuxeleded.pdf
    • https://cdn.shopify.com/s/files/1/0434/4135/6967/files/biseptol_prospect.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8886/files/tufikawegaga.pdf
    • https://cdn.shopify.com/s/files/1/0440/8524/8165/files/college_physics_2nd_edition_knight.pdf
    • https://cdn.shopify.com/s/files/1/0435/8730/5629/files/nofonipilusigonorarizuxa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7952/2714/files/retifexiwibegole.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3279/files/71460431472.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/rexaparaximejul.pdf
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/fupujugodazewinadogetiv.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/fabosotexuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/1976/2840/files/mufikoxubidinodumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5178/6145/files/lepodazudulif.pdf
    • https://cdn.shopify.com/s/files/1/0432/8158/0200/files/nepumenasa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065ea.bin
ead314e433421e65c36d41d39fc7380a2b85286f5a08d1a408dc3eb3bdb32125		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65EA 5468 bytes
font_01_sfnt_off000078b9.bin
e7e90ebd3e0be092056c67e665acdeac47c6f27a98208dcbe0c131c4209ff62f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B9 10708 bytes

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