Malicious PDF — malware analysis report

Static analysis result for SHA-256 160367b709a8e5f8…

MALICIOUS

PDF

50.2 KB Created: 2020-08-06 22:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99680a8bc849e8b50d728febb33995d6 SHA-1: 3a4d45dac49393505041bd3ddce0e0ef0aca91f8 SHA-256: 160367b709a8e5f8bdb27f82c162ba8722f0a4922895eeee49616a04f5824b02
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains, but one critical link redirects to `ttraff.com`, identified as malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'Gmat verbal practice test pdf' and the malicious URL, suggesting a lure. The presence of a download button heuristic further supports the malicious intent of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=gmat+verbal+practice+test+pdf
    • http://barowa.columbiavalleybiblefellowship.com/uploads/1/3/0/7/130776407/xetoloregadunobofogu.pdf
    • http://files.uwphisigmarho.com/uploads/1/3/0/7/130739916/kikoxoko.pdf
    • http://wagiz.jeffestill.com/uploads/1/3/2/7/132710592/tuxebusepubele.pdf
    • http://files.tradeinnovations.com/uploads/1/3/1/8/131856330/9856409.pdf
    • http://files.australianmaritime.org/uploads/1/3/1/4/131453124/komaraju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3128/8216/files/pafotavuxiwivufis.pdf
    • https://cdn.shopify.com/s/files/1/0435/5981/3279/files/5819496134.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/jojirodozizavolabifil.pdf
    • https://cdn.shopify.com/s/files/1/0438/4597/6224/files/56457891563.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6565103434.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/setedavagukigomopulo.pdf
    • https://cdn.shopify.com/s/files/1/0444/0604/6886/files/gazelle_power_plus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdf
    • https://cdn.shopify.com/s/files/1/0436/0408/2851/files/garikirujipadazu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9333/4952/files/bluetooth_won_t_turn_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/6322276167.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/28299857052.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_off00008599.bin
17cb66324600bf1fcb6475adae99baf06abe4afe31a740f4ceb01c484597079a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8599 5532 bytes
font_01_sfnt_off00009854.bin
bccd3aec40b84911fbfb7a7df61520dfe6d70ecfb15fac0a2cda2f4ab8ec00b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9854 10508 bytes

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