Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fd026111e32668e…

MALICIOUS

PDF

46.8 KB Created: 2020-08-31 07:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 560f3217871a9a5afffc1ef69f0c54f3 SHA-1: e05f9d348a68be7d65e051cf49d946dc74c258bb SHA-256: 7fd026111e32668e404de1cd7e9cce24b66f25901996879fe6095854456d52f3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to known malicious infrastructure, disguised as a tutorial for 'ms access 2013'. The document body also contains numerous links to external PDFs, suggesting a link farm or SEO manipulation tactic. The primary malicious URL is ttraff.cc, which is flagged as a redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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=ms+access+2013+tutorial+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/f515ca_9fe08c3b3ca24182b149bb86224d3fdb.pdf
    • https://static.usrfiles.com/ugd/5cf23b_6ceb7fe96d7c4e979fe356d421d9df77.pdf
    • https://static.usrfiles.com/ugd/08fe48_b1ff02c47962459ebce146fa45778544.pdf
    • https://static.usrfiles.com/ugd/ac72e0_3a3fd945046b422cb3e6d05cb26bd984.pdf
    • https://cdn.shopify.com/s/files/1/0433/9616/9886/files/3152192035.pdf
    • https://cdn.shopify.com/s/files/1/0447/9343/0177/files/ccna_exam_questions_and_answers_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8437/3406/files/starcraft_2_units.pdf
    • https://cdn.shopify.com/s/files/1/0437/8837/0077/files/contaminacion_atmosferica_en_la_ciudad_de_mexico.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_off00007865.bin
3e0daa2089739de8f91a31663cb8479d0030a2879c9a85fe8fbf3bd5987f9816		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7865 5644 bytes
font_01_sfnt_off00008ba7.bin
7ff11712d10554b12aba900e6181c891af09cdd3f9d70808bb61e0369900661c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA7 10728 bytes

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