Malicious PDF — malware analysis report

Static analysis result for SHA-256 7343cb8758cd108b…

MALICIOUS

PDF

36.4 KB Created: 2020-08-18 15:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b480db618b7b1f97961a2ee10e3d649e SHA-1: 3d9d91129297115a2d159f5bda72e62c1583b978 SHA-256: 7343cb8758cd108b787163b1b0adf1cf19971337a7d27dc0885a9982c18c9be0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains with numeric slugs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.cc), indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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=total+conquest+hack+320x240
    • http://files.spartan-drywall.com/uploads/1/3/0/8/130874050/tewodifimutavavize.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/72587512428.pdf
    • https://cdn.shopify.com/s/files/1/0433/9453/1493/files/nina_bruce_warren.pdf
    • https://cdn.shopify.com/s/files/1/0432/3721/2319/files/nulusozu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2432/6564/files/kagan_strategies_for_math.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pujipipokumamidepuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/40695194089.pdf
    • https://cdn.shopify.com/s/files/1/0428/5795/5487/files/96680489150.pdf
    • https://cdn.shopify.com/s/files/1/0428/9092/0099/files/53351165540.pdf
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/47888819735.pdf
    • https://cdn.shopify.com/s/files/1/0435/7586/9599/files/across_five_aprils_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/limopo.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_off00004fb7.bin
403877f1b4c35c1c55d46358d2f5199b88c8ba7635bf5763077ffeccbb325d13
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FB7 5524 bytes
font_01_sfnt_off00006289.bin
f6026bce0ece8c996a0d786f6dcc36fe8e777923bcca90e030518ebfdd3d88cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6289 10232 bytes