Malicious PDF — malware analysis report

Static analysis result for SHA-256 658f98586c6aed06…

MALICIOUS

PDF

36.5 KB Created: 2020-08-14 20:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee4d5dd900918bd2f356e2117a99503a SHA-1: 6d87e278cca1093e0c43d14c3b1a458cf608e5c4 SHA-256: 658f98586c6aed0601aed4bdf903856aa1ed32cf3dfe683c929e32987b67d9c2
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One prominent link, 'https://ttraff.cc/wb?keyword=men's%20health%20training%20guide%20pdf', is flagged as a malicious redirector. The document's structure and the presence of numerous external links suggest an attempt to drive traffic to malicious infrastructure, likely for phishing or malware distribution.

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/wb?keyword=men
    • http://files.tuftslaw.net/uploads/1/3/0/8/130873942/dadijo-zebejuzuzafim.pdf
    • http://files.podicongo.com/uploads/1/3/0/9/130969742/1659992.pdf
    • http://files.hirneisenhighflyers.com/uploads/1/3/1/1/131164153/muwobetokezuf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/7359/1703/files/vepejeluxex.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/murusijozazaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/33133955422.pdf
    • https://cdn.shopify.com/s/files/1/0434/0236/3045/files/nomosadasijomizolizilux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dofupuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/3181/2504/files/sisufogezojixiriso.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2411/files/datimimuvasoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/toveziwibipowivoliw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16949815227.pdf
    • https://cdn.shopify.com/s/files/1/0431/4031/7335/files/91901395229.pdf
    • https://cdn.shopify.com/s/files/1/0432/2348/2525/files/lepolixifitopudisiwan.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_off00004478.bin
fb3b650b8e0211a4118a1354a7c8a257e52900cb822ec10e998f6bc6b2b73ae3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4478 5116 bytes
font_01_sfnt_off000055d5.bin
0b4433b1047978ebfbb5c1cbdb2af6d96ee552d5bda32f7e493da5b674b2ff1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55D5 9632 bytes
font_02_sfnt_off000076d9.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D9 4324 bytes

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