Malicious PDF — malware analysis report

Static analysis result for SHA-256 102c320fe3084386…

MALICIOUS

PDF

42.2 KB Created: 2020-08-31 22:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d4f127dce394f92fd0d33981d59a1c7 SHA-1: 5e1090d0814d8c0a4c3bf22c41d47b91e3396b63 SHA-256: 102c320fe30843860d6dced62e3dff3aedd6e4d881ef5460b73e4d94cbf9fd74
174 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to funnel victims to a phishing or scam page. The document also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The presence of a callback lure further supports a phishing or scam intent.

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.ru/wix?keyword=report+nuisance+calls+singapore
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5812/5207/files/xemezatenodutupufima.pdf
    • https://cdn.shopify.com/s/files/1/0434/3876/8284/files/pentax_k1000_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/7823/5798/files/cub_cadet_ltx1040.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9777/files/exploring_waves_physics_classroom_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/5219/6249/files/lokag.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/jiputekonaku.pdf
    • https://static.usrfiles.com/ugd/e2f197_cad27449895e420a86a7a44e31207803.pdf
    • https://static.usrfiles.com/ugd/b0b521_ce5c1ef887a94ccf8fa74599b508c26c.pdf
    • https://static.usrfiles.com/ugd/77eba6_7f3a88f5e1ef48c8a57a0da844280de7.pdf
    • https://static.usrfiles.com/ugd/eb6612_42775824b540476aa9abacf53fae90ce.pdf
    • https://static.usrfiles.com/ugd/26481d_128492bfe9fb4e6b928895d48de201ac.pdf
    • https://static.usrfiles.com/ugd/89064d_f8af4b03e1c542b8967a58a33682fe1b.pdf
    • https://static.usrfiles.com/ugd/906e9f_e50d6af0e6be45af8436777c1bae3223.pdf
    • https://static.usrfiles.com/ugd/9ea91e_3ff95b914f1a41db81e73bd8392780db.pdf
    • https://static.usrfiles.com/ugd/b8c837_965c8c0373814048ad8d9eb9b11ac205.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_off000065d3.bin
16753acca31dfbfa8c6a1fc7fae7840d2891b6d47f0dfd4c2973f6a26c9dc3b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D3 5108 bytes
font_01_sfnt_off00007749.bin
d957f849e0f0a4d9161368ba86ff0406e02b939e1fcb7bb982f107f312c12172		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7749 10748 bytes

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