Malicious PDF — malware analysis report

Static analysis result for SHA-256 6532101b97fa4bc2…

MALICIOUS

PDF

40.2 KB Created: 2020-08-18 19:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5429771fc37a324f684e2ff40d603a90 SHA-1: 92a8d693f312fa5ab5daa3667b67888e71481800 SHA-256: 6532101b97fa4bc243d14f1faf96cbddb84004ffc29b5756b8a28ff9699ce197
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body also contains numerous links to PDFs hosted on Shopify, likely part of a link farm to improve SEO for malicious content. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports this assessment.

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=blackberry+9320+os+7.+1
    • http://files.auburnchristianchurch.com/uploads/1/3/0/8/130873794/2059526.pdf
    • http://files.pinchofgeek.net/uploads/1/3/1/6/131607075/livuwapazudixena.pdf
    • http://files.breathlifeministries.com/uploads/1/3/2/6/132681317/fa115c62bc8b01.pdf
    • http://files.erp-selection.org/uploads/1/3/2/3/132302780/momigogogimujosise.pdf
    • http://warew.wonderworkslearningandarts.com/uploads/1/3/0/8/130874359/kazutis-botakuzupusiwa-wijap-titufidogexuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/gaxop.pdf
    • https://cdn.shopify.com/s/files/1/0437/9030/3381/files/vidizimegipetiruzikeku.pdf
    • https://cdn.shopify.com/s/files/1/0431/8091/6893/files/fanuc_arc_mate_100ic_manual.pdf
    • https://cdn.shopify.com/s/files/1/0443/5096/3868/files/45062205609.pdf
    • https://cdn.shopify.com/s/files/1/0430/5167/9893/files/niborixosedojumipuxaxoxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/58683464594.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/sapigejisuzibini.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/wejunegunimirawotofigiwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/classification_of_bacteria_according_to_bergey_s_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fba.bin
79f01db312cdf78cc78832e164e88a731824b91550597a2b33211bc77b9e6c77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FBA 5460 bytes
font_01_sfnt_off00006262.bin
ee92e107802def8b8bfc9261508751a53fcf83616491b0d501dd3f1da0cd7ac0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6262 10908 bytes
font_02_sfnt_off00008633.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8633 4324 bytes

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