Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bdd8e9204a500b7…

MALICIOUS

PDF

48.0 KB Created: 2020-08-30 04:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e6fcced28a02f85c65597dd9d2cbf12 SHA-1: 396e50c2e2ec26cd2f56451f6e261477dd416506 SHA-256: 5bdd8e9204a500b785ab830f0126e6dfdf5cf080b5ce865028d6b351d0ea9b9f
174 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically `https://ttraff.com/wix?keyword=national+center+for+competency+testi`. Additionally, it exhibits characteristics of a link farm, with numerous embedded PDF links. The 'SE_CALLBACK_LURE' heuristic suggests the document may be designed to trick users into calling a fraudulent support number, further supporting a phishing or scam-related attack pattern.

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=national+center+for+competency+testi
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4977/0395/files/58428516395.pdf
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/86502919372.pdf
    • https://cdn.shopify.com/s/files/1/0438/3208/2594/files/86007061910.pdf
    • https://cdn.shopify.com/s/files/1/0451/3798/5690/files/bioaccumulation_des_polluants.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wajafaliwufenosikem.pdf
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/apc_smart_ups_3000va_lcd_230v_smt3000i.pdf
    • https://cdn.shopify.com/s/files/1/0465/2761/1038/files/zomukedugadakuw.pdf
    • https://static.usrfiles.com/ugd/52b593_9f4275d0db6347de92bd793f878d4484.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8cc72e9102f4551aa5bf8b1f0753a2a.pdf
    • https://static.usrfiles.com/ugd/e4ff69_12cf9b2086c04453993f006d903407d6.pdf
    • https://static.usrfiles.com/ugd/b916f4_03c05268dcb64b3cb9c7ea5603acd353.pdf
    • https://static.usrfiles.com/ugd/bf650e_571fcbbeaca4464eba5e131c7bc86cc1.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0ec9d01b5224ac2b0db595c21313d7c.pdf
    • https://static.usrfiles.com/ugd/353d00_b18ff8bffdd34cfb88706fd3351834dd.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_off00007c10.bin
dc2a4e271ac0425973a4b5784209e045b74b599c1a5dd93df3ec4bb475cec2f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C10 5232 bytes
font_01_sfnt_off00008dcd.bin
7ea5d767bfeb969d67afd4b2589dd3592f061cb48821725e935d8bc08ff52156		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCD 10976 bytes

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