Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d616ece8166fc85…

MALICIOUS

PDF

42.4 KB Created: 2020-08-01 21:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2035e730e9c7a8d4e1754ee25d0748b2 SHA-1: 5e0561d15d62df423c20ccf0c307a3fd38eac47c SHA-256: 0d616ece8166fc85e654571afaffad3790cfa5ec6038125161cb998dbe13d2ca
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a 'marshalls job application form pdf' and includes the malicious URL, suggesting a phishing or scam attempt. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation or to host further malicious content.

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.ru/pify?keyword=marshalls+job+application+form+pdf
    • http://files.reneeheissart.com/uploads/1/3/1/6/131637307/zasobusopano.pdf
    • http://files.fabulousfollies.net/uploads/1/3/1/1/131164308/208f556d548fa.pdf
    • http://files.livinghealthychiropractic.com/uploads/1/3/0/7/130776607/01ec0230a2032.pdf
    • http://files.18crossroad.net/uploads/1/3/1/6/131637325/kifezuko.pdf
    • http://files.matthewsabeyart.com/uploads/1/3/2/7/132710627/kisonetevekof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/buvinopi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/dakofivitoxosufok.pdf
    • https://cdn.shopify.com/s/files/1/0433/7605/0330/files/64697214242.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/92613264963.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/66680754847.pdf
    • https://cdn.shopify.com/s/files/1/0433/8194/8567/files/pixoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64255738852.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/ramujanozusopigux.pdf
    • https://cdn.shopify.com/s/files/1/0438/2015/5037/files/vebetunudijituxejamok.pdf
    • https://cdn.shopify.com/s/files/1/0433/1402/0505/files/rawagimap.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_off000065fc.bin
3092281d2781ae46231d75d9cb6548f9879e201f1c661a635dd35c04199d8985		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65FC 5616 bytes
font_01_sfnt_off000078f6.bin
bb063b5b10f3b02bcf263a7ed4b3b1be7e4f1bb32aef8a6795402ea5d695b12d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F6 10376 bytes

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