Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c3d86f87d5453f…

MALICIOUS

PDF

43.5 KB Created: 2020-09-03 19:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f47f71a9298e193819651538a400c2e2 SHA-1: 87a2797648f7a4173167285bc0a5ef87f29980ec SHA-256: 16c3d86f87d5453feb59c15b107a761556307bd6d886fe8bdd9d745a8152e8ea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.me/wix. The document body, though heavily obfuscated, contains this URL and appears to be a lure for 'bohemian rhapsody sheet music'. The PDF also contains a large number of embedded links, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. The primary malicious IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/wix?keyword=bohemian+rhapsody+sheet+music+piano+pdf+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/1140/5986/files/25047419168.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/numabib.pdf
    • https://cdn.shopify.com/s/files/1/0431/1462/7234/files/general_characters_of_bryophytes.pdf
    • https://cdn.shopify.com/s/files/1/0440/3301/5958/files/aslam_habib_gojol_hd.pdf
    • https://static.usrfiles.com/ugd/52b593_079f43c776cd4ef2b3759830344252f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_7585e1ec8383488db84ed44e861f91d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_80314a30d10c4facaac57f5f2912e18e.pdf
    • https://static.usrfiles.com/ugd/b8c837_7de288fed27540c89c218e76bc81b2e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_3011a4f3a1d545b59a2c0ab3f6444fef.pdf
    • https://static.usrfiles.com/ugd/ade4e6_309612c8e54447b3918ea12a1b0afe36.pdf
    • https://static.usrfiles.com/ugd/0049ca_be332b1583ae47428416aac7dc96f28a.pdf
    • https://static.usrfiles.com/ugd/ba3095_e75a11faf6ad448ba932405dee69b1df.pdf
    • https://static.usrfiles.com/ugd/b8c837_2118bb7747e146ccbc5113a3c7f1e372.pdf
    • https://static.usrfiles.com/ugd/0789d5_3f6ea830454f4e6680e445a143ef8ab6.pdf
    • https://static.usrfiles.com/ugd/f515ca_0d4235811d454b9792cce441a6689da2.pdf
    • https://static.usrfiles.com/ugd/8acad3_26dae8f28e6445199e4770dca0b7a2fc.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_off00006911.bin
336321f481bcdf9f17c072bbe6679f62c5315c123d9712e8a4bbeac255b45b2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6911 5516 bytes
font_01_sfnt_off00007bad.bin
7bb7044e232113b2e6b33c88618ce0ce7aa2c32df3a539da9d7ef3214b65a2d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAD 11336 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.