Malicious PDF — malware analysis report

Static analysis result for SHA-256 029f9e9a3357a83a…

MALICIOUS

PDF

38.6 KB Created: 2020-08-30 07:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccd6025be54e8197765e754d1ef82fc4 SHA-1: c89cb87362f0f5349725dcd3f421dc8039db2306 SHA-256: 029f9e9a3357a83a555d81ed26b39346fd43cd4ac746cd4c57961efd75141df2
174 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector infrastructure (ttraff.com). The document body, though heavily obfuscated, contains text related to 'Delco radio repair' and a URL, suggesting a lure to a malicious site. The presence of numerous other links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic to distribute 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.
  • 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/wix?keyword=delco+radio+repair
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/begrijpend_lezen_groep_6_werkbladen.pdf
    • https://cdn.shopify.com/s/files/1/0430/5390/8117/files/dexonofopozarewen.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7957/files/bombay_high_court_shortlist_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1161/2572/files/conundrum_anuj_dhar.pdf
    • https://static.usrfiles.com/ugd/b8c837_a97515deabf44a8f893645208f2536d5.pdf
    • https://static.usrfiles.com/ugd/91e123_fc25cf3bdcfb4fc7beb70aef8b9e9f07.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b8d0798de2a4789a4b0b27ac73622b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_915fbe5ade9346ce8f67f7844ead7270.pdf
    • https://static.usrfiles.com/ugd/b8c837_c62e202a32fb4ecc8e6e960da1c54b8a.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f4c05d4cd9f4809ad1a8fb468ce694b.pdf
    • https://static.usrfiles.com/ugd/b8c837_685805a2e6f94bc3a55f425cf588e642.pdf
    • https://static.usrfiles.com/ugd/b8c837_45efedfe25864268ad47df863318a9b9.pdf
    • https://static.usrfiles.com/ugd/455f95_bf0d58d263cd453dbf85898779443eba.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_off000059a6.bin
86983125b828748a16a20ece9ac018b29108a2a65128373b67dfb1a7137895fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A6 4888 bytes
font_01_sfnt_off00006a4f.bin
729bb9655344c3a93882c6adc57c306dee2b32a2306795f64fd35a7e00fe94c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4F 10492 bytes

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