Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8b4c2e2c80923f7…

MALICIOUS

PDF

44.3 KB Created: 2020-08-15 03:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d2a2fe868b1944c6e85ab659dc933c6 SHA-1: 3ef81b1944f9ce14c679befacae46094b596c9c1 SHA-256: b8b4c2e2c80923f7813a63988c7abcc3127f8c43c62ef8cafb7c45617752d640
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used to inflate search engine rankings or distribute malicious content. One of the primary links, 'https://ttraff.cc/pify?keyword=pancreatic+anatomy+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the same URL and other PDF files hosted on various domains, suggesting a link farm or redirection scheme designed to lead the user to malicious content.

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.cc/pify?keyword=pancreatic+anatomy+pdf
    • http://fimet.bellheirbordercollies.com/uploads/1/3/0/8/130814328/vakosunuvagixom-nagijuguzi-liwunasademoxov.pdf
    • http://files.dollessence.com/uploads/1/3/1/3/131383629/regovumo-ratifef-nobupe-kutovogafek.pdf
    • http://files.msdlaroche.com/uploads/1/3/2/3/132302749/nalanowobagurujapo.pdf
    • http://files.sailingwildhorses.com/uploads/1/3/1/3/131398598/lepogi-tebonajagabuvet-xatosevepidoji-kafadomonubu.pdf
    • http://files.safe-t-systems.net/uploads/1/3/1/0/131071063/4845330.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/xixetefevajekowuseke.pdf
    • https://cdn.shopify.com/s/files/1/0429/4790/3644/files/kptcl_recruitment_2020_notification_in_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/62378097699.pdf
    • https://cdn.shopify.com/s/files/1/0434/7287/9773/files/vlookup_function_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1418/files/encefalopatia_bilirrubina_neonatal.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/3172527076.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/kajulaguvekil.pdf
    • https://cdn.shopify.com/s/files/1/0434/4909/0200/files/types_of_malicious_code.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/psc_bulletin_silver_jubilee.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/22360252175.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/biguzetisofovimizer.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_off000070fb.bin
8b1414e6b13e7e14e462afea23e7132c263c62ce9a47364ad59e0e94bd62140e
pdf-font-stream PDF embedded font (sfnt) at offset 0x70FB 5196 bytes
font_01_sfnt_off0000828e.bin
0fb5e4a421805fdbd82ee72d313b7d73c431775055e23984857bb364a5590a12
pdf-font-stream PDF embedded font (sfnt) at offset 0x828E 9920 bytes