Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd7ff530df618c7…

MALICIOUS

PDF

39.5 KB Created: 2020-09-02 09:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e3205c31278787aad7fe100d34e3e73 SHA-1: f25d850c4e3bcec2bf335b020e21e3a9975f6582 SHA-256: 5bd7ff530df618c77e03544530b7e9c2d621ad676404ee25391078f742320c36
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links, one of which, 'https://ttraff.cc/wix?keyword=transunion+free+credit+report+online+canada', is flagged as a malicious redirector. The document body and heuristics suggest a lure related to credit reports, potentially leading to a phishing or scam site. The presence of numerous other PDF links, though benign, indicates a link farm strategy. The ML classifier strongly indicates maliciousness.

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.cc/wix?keyword=transunion+free+credit+report+online+canada In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/fomikave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/2445/0471/files/lekedadugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2490/0515/files/71197970486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8605/2518/files/8948542869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/61131082743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6142/7867/files/revuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7809/0901/files/19524466686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/9857/0651/files/journal_of_general_internal_medicine_author_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gumuwajufutoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8153/9487/files/adobe_reader_old_version_download_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1395/6006/files/17935773627.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b7b.bin
d569c3602b861beea905ff19fe27b31220a4a9f5191db6b196b8b33aa4a26d08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7B 5100 bytes
font_01_sfnt_off00006cdd.bin
22ccdd6fbdefaada66209f1bea14c0f79e6308328e7e1c36fa728c8a52ec5107		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDD 10816 bytes

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