Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d9f2366aa4bd26…

MALICIOUS

PDF

76.8 KB Created: 2020-07-28 14:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7139b999b4104a63a9c6fa6025eeb67 SHA-1: a3f51bfc57ffa24365cbc480f98203679ee3e678 SHA-256: 60d9f2366aa4bd2632ade693fc185034bf8afbffb2c83f5faae146f664c0c3e6
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links pointing to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, suggests a lure related to medical information ('cerebral ischemic stroke pdf'). The presence of numerous external PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning attempt to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=cerebral+ischemic+stroke+pdf
    • http://files.artistskayak.com/uploads/1/3/0/8/130874658/bonumokom.pdf
    • http://files.joeantoshak.com/uploads/1/3/2/6/132696030/sepitotada.pdf
    • http://files.witinallshop.com/uploads/1/3/1/4/131453021/ae1e5.pdf
    • http://files.eastviewyearbook.com/uploads/1/3/0/8/130874141/3787214.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8982/0836/files/zapenamixere.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/pivujikovoposipit.pdf
    • https://cdn.shopify.com/s/files/1/0428/8951/1071/files/kivunafusule.pdf
    • https://cdn.shopify.com/s/files/1/0430/0154/4863/files/jebukeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/4834537920.pdf
    • https://cdn.shopify.com/s/files/1/0433/0412/4580/files/wewakewog.pdf
    • https://cdn.shopify.com/s/files/1/0429/3433/7695/files/8801061674.pdf
    • https://cdn.shopify.com/s/files/1/0429/1064/6435/files/73747989923.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7975/files/29397197448.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_off0000ea95.bin
68c58cfbae089c33107766a55f4f7bc84868f11f1882d3bfc6f64f155f2d7624
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA95 5304 bytes
font_01_sfnt_off0000fc99.bin
c04140001fb6205a666482f12e1812f539448764c25e67639dbfb45f74b67b3d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC99 12900 bytes