Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d2fd4775632b901…

MALICIOUS

PDF

59.5 KB Created: 2020-07-27 12:03:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe0db096943428bad78707d4f5046c5b SHA-1: c9d093f0e0344645c71caadc7011e0daad652d8e SHA-256: 7d2fd4775632b9011782af998d6fae5aa182d20fedd8a75dbf19449416f33dfb
174 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. It also exhibits a PDF link farm heuristic, with numerous links to Shopify-hosted PDFs, suggesting a campaign to distribute malicious content. The document body, though heavily obfuscated, contains references to 'Firefox browser' and 'wkhtmltopdf', potentially used as a lure. The presence of embedded URLs and the ML classifier's high confidence further support a malicious classification.

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.
  • 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.
  • 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=firefox+browser+47.+0.+1+free
    • http://files.haciendasonoma.com/uploads/1/3/2/7/132740218/7130198.pdf
    • http://files.luckyjacksfishing.com/uploads/1/3/0/8/130874522/likibitaf.pdf
    • http://files.12strings.ca/uploads/1/3/1/4/131483009/dukefodo.pdf
    • http://files.isrwaterselfrescue.com/uploads/1/3/1/3/131382721/27637.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/1281/5010/files/80596014073.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5556/files/4211646142.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/noxuvenonal.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/mexelejimoxomatowe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/14550759222.pdf
    • https://cdn.shopify.com/s/files/1/0431/4306/9845/files/divuzi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6522/1015/files/85246863073.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/vegematejupedibumimiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/wagazuwewipotirepegopuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/80714801824.pdf
    • https://cdn.shopify.com/s/files/1/0433/4200/4375/files/sijutudaxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/duxomenudatibulufutokoj.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_off0000abde.bin
eef49a4039c544dc472591df10fea75e3e931ce24df8d7225fb7cd8660cd94ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABDE 4768 bytes
font_01_sfnt_off0000bc49.bin
d41ebe1a22458af471bd4f3e561fd90515496629df8480453071c3b04f2b4325		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC49 10540 bytes

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