Malicious PDF — malware analysis report

Static analysis result for SHA-256 33f11bd1119b4118…

MALICIOUS

PDF

39.0 KB Created: 2020-08-30 10:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76546080ea953f35fbdb1c0145c7d45c SHA-1: 1507800e09c638993396e4857e9cec16a66ccd77 SHA-256: 33f11bd1119b41188308b01eaac77e650c0376124a996ddff55ecda6ac8b590f
182 Risk Score

Malware Insights

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

This PDF document contains a malicious redirector link to 'https://ttraff.ru/wix?keyword=ashley+stewart+corporate+office', which is flagged as malicious infrastructure. The document also exhibits characteristics of a link farm, embedding numerous other PDF links, and uses urgency and callback lures. While no scripts were directly extracted, the presence of malicious URLs and the document's structure strongly suggest it is designed to lead the user to a compromised site, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/wix?keyword=ashley+stewart+corporate+office
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/cf14a4_104027e67dc84c069ffd9834ed6a214d.pdf
    • https://static.usrfiles.com/ugd/b8c837_30297933327744d3952ed34545a7ef9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_653b4965d3fb433f8d4c65a45cf23aa2.pdf
    • https://static.usrfiles.com/ugd/4f270c_beac971e62e34af3afe9d3f09590e906.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe4d156699cb4103ae10e8fb5e5bc39a.pdf
    • https://static.usrfiles.com/ugd/b8c837_06205787d8f742418bc3961336617df3.pdf
    • https://cdn.shopify.com/s/files/1/0437/9446/4929/files/kiroxexumupeze.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/dasivo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5576/6942/files/xitafijagatinugezoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/6644/8277/files/xesaxis.pdf
    • https://cdn.shopify.com/s/files/1/0431/5090/1402/files/wamom.pdf
    • https://static.usrfiles.com/ugd/bae363_e7977441425f45019f3308b2372a916c.pdf
    • https://static.usrfiles.com/ugd/b4a829_8ddcf971d9904cf1b02df8e3118806af.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_off000059ab.bin
1f97f0db78d658bba7ae9c649036c5c9a61afc4408ce88a6837c2cdeebc8dd98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59AB 5288 bytes
font_01_sfnt_off00006bb4.bin
aa5af9c179907fecd0cc7e1c9ae5397cd81a50d20be824037b8e44c7eec3882a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB4 10572 bytes

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