Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f3623a078caa423…

MALICIOUS

PDF

34.3 KB Created: 2020-08-30 10:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b267a3296185c6a45d0a02ee94c94b0 SHA-1: 517224a2e23c86855248af1ea1922506c9e51c17 SHA-256: 6f3623a078caa4239e3cc6df2c695b961ecbc7317e6cc43e1cbd1a0e95db7393
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 used to funnel victims to malicious content. The document also contains a large number of embedded links to PDF files hosted on Shopify, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent.

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/wix?keyword=kenwood+ka-5700+wood+case
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/bevigiwemunidulevi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1123/6259/files/dobomodenasulesiniza.pdf
    • https://cdn.shopify.com/s/files/1/0462/4144/8090/files/balancing_act_practice_worksheet_science_spot_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/0863/0681/files/45749636684.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/91224367941.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/3345874247.pdf
    • https://static.usrfiles.com/ugd/cc089a_f038ef397d044422bb90f1325e7e4444.pdf
    • https://static.usrfiles.com/ugd/9374a7_246c28a139f246869f0fd1d3f4472ef0.pdf
    • https://static.usrfiles.com/ugd/de65f7_ea19e3820492467e887ad85132c5de26.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc9f49499aad4e9d969b7b51fc7e39d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9f18cad06e041a6baedb4428c042c3d.pdf
    • https://cdn.shopify.com/s/files/1/0433/8191/5802/files/how_to_initialize_a_git_repository.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/643184136.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_off000048e3.bin
674713f7e66a93424b7da3a85d838861a5873f372e97b12ace282d1e4b2360fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x48E3 5308 bytes
font_01_sfnt_off00005b31.bin
385ed9963775c1867fd21a89bf449894d71a11bc0722fde64ef4be9c4a4475d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B31 9860 bytes