Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4da06d75bd24170…

MALICIOUS

PDF

62.0 KB Created: 2020-07-16 19:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6ee334c219a44e069d9354ed500bd0a SHA-1: d3615b89bd33a401e253e2b1a08875f30f04e095 SHA-256: c4da06d75bd24170dab005647130cab190fa6e9783646fc3edad0e2765f55c2b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, many of which point to external Shopify domains, suggesting a link farm or content distribution strategy. One critical heuristic identified a link to 'ttraff.cc', a known malicious redirector. The ML classifier strongly indicates maliciousness. No scripts were extracted, but the primary attack pattern involves redirecting users to potentially harmful external content.

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=aneuploidy+and+euploidy+pdf
    • http://files.mitchb.net/uploads/1/3/1/4/131454459/3930735.pdf
    • http://files.cardsbyconnie.com/uploads/1/3/1/8/131856270/wetelig-wurekaxo.pdf
    • http://files.ironhawkelevator.com/uploads/1/3/1/4/131454436/rigivoxozepasopafoxi.pdf
    • http://files.epalmspringsrealestate.com/uploads/1/3/0/7/130775050/5352504.pdf
    • http://files.epalmspringsrealestate.com/uploads/1/3/0/7/130775050/5352504
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/10243426729.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/guwesimutetalajizobanubel.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/tixoton.pdf
    • https://cdn.shopify.com/s/files/1/0433/4718/1718/files/13842007593.pdf
    • https://gofedig.files.wordpress.com/2020/07/95329944819.pdf
    • https://fafepewadala.files.wordpress.com/2020/06/28318812805.pdf
    • https://jenunosij.files.wordpress.com/2020/06/meteromubuzufe.pdf
    • https://cdn.shopify.com/s/files/1/0428/8125/3535/files/donamol.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6353/files/84869035877.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kozaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/2028/8153/files/dotukatumopadete.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2564/files/76519940095.pdf
    • https://cdn.shopify.com/s/files/1/0428/8099/1395/files/bosasofisufaxukajesipif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xidab.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_off0000ab4d.bin
ea4e292d711c7c81e473571f04d0489f9236d2966615e2aa67f476c3beaee02c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB4D 4656 bytes
font_01_sfnt_off0000bb36.bin
4954003641ec8d061ea6137a6b3fc004ade02db4b001587a947df8113ea825ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB36 15176 bytes

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