Malicious PDF — malware analysis report

Static analysis result for SHA-256 e634a7e1a7d377c7…

MALICIOUS

PDF

42.9 KB Created: 2020-08-07 20:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76ab711e4b29d0e9244aa05f3f47a583 SHA-1: bffc600a6c2e4e8afc608b32aa95ecdd1166adc7 SHA-256: e634a7e1a7d377c731a00889d067a97fb79f260ba4241ee62ef5d45d5a579776
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a common tactic for SEO spam and phishing. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/wb?keyword=astm%20rubber%20testing%20methods%20pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to drive traffic to this malicious redirector, likely as part of a larger phishing or malware distribution scheme.

Heuristics 3

  • 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.
  • 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.ru/wb?keyword=astm%20rubber%20testing%20methods%20pdf
    • http://files.fritzglass.com/uploads/1/3/0/7/130775563/tozodejokawadel-jeguru-jaxumimo-tufutuloxe.pdf
    • http://files.goodstuffbyshalonne.com/uploads/1/3/0/9/130969408/9556525.pdf
    • http://lefurame.artbynicolamclean.com/uploads/1/3/0/9/130969368/doxezoweruv.pdf
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/79980368490.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0300/files/nerefafiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/2677/5196/files/93728393303.pdf
    • https://cdn.shopify.com/s/files/1/0430/9087/0423/files/xobizizejakapi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/jafekejanekibizaleraxil.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5809/files/6pm_in_new_york.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5360/files/45227847507.pdf
    • https://cdn.shopify.com/s/files/1/0435/6639/9647/files/68355150907.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fuwemosuwizukuxitakalav.pdf
    • https://cdn.shopify.com/s/files/1/0440/6129/4757/files/winiwojoruroxuda.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8065/files/livre_pour_apprendre_a_parler_l_anglais.pdf
    • https://cdn.shopify.com/s/files/1/0450/8984/9509/files/jamb_biology_syllabus_download.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_off00006abf.bin
ab67ebe3bb6a3b319640827d32811bbff3296a5fe21a6a3a7a2d75fef71d610e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABF 5340 bytes
font_01_sfnt_off00007cbf.bin
868b3f816e5eb9791ed9bb900afc44c22616ae6e17e5a55fc3a0ab628f88a892		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBF 10020 bytes

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