Malicious PDF — malware analysis report

Static analysis result for SHA-256 922a29ccceebc199…

MALICIOUS

PDF

45.6 KB Created: 2020-08-21 23:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a92193f8505ac39ad86400561504938 SHA-1: 4dd39e2c7cce1b7dc8d57590ddc32c8562a3947f SHA-256: 922a29ccceebc19996853cd4e0121e2038fd99403e8c64ac696a2d6c6796c68f
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, ttraff.com, which is flagged as malicious. The document body, though partially corrupted, includes the same URL and keywords related to product reviews, suggesting a lure to entice users to click. The presence of a large number of embedded links, many pointing to Shopify, indicates a link farm strategy to potentially improve SEO for malicious content or distribute further payloads.

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=cordless+phones+with+answering+machine+reviews
    • http://files.lebanontours.online/uploads/1/3/1/8/131856306/5832704.pdf
    • http://dukewajo.shannonsstudio.com/uploads/1/3/2/6/132683292/9128695.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/69746098134.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/zifoworepogi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/cirrose_heptica_medicamentosa.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/49508395071.pdf
    • https://cdn.shopify.com/s/files/1/0434/1684/6488/files/jubinixulaxoled.pdf
    • https://cdn.shopify.com/s/files/1/0435/1596/9688/files/gajodamosurusalew.pdf
    • https://cdn.shopify.com/s/files/1/0438/2323/5234/files/ge_profile_artica_refridgerator.pdf
    • https://cdn.shopify.com/s/files/1/0429/5606/2876/files/vokeroda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0435/6413/8651/files/24726832002.pdf
    • https://cdn.shopify.com/s/files/1/0439/6479/2990/files/xivofovisofosoxixem.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_off000072e7.bin
996e0b8445431f09666a12cf5ef77b3f9e47860d8d8d42ad1b513d39efe0c3d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x72E7 5544 bytes
font_01_sfnt_off000085ad.bin
643476c572ebf048e6d167ad3bcb1fb65d2d48813ba2984fe075824e82b094ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x85AD 10336 bytes