Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e3da2fbdf1b45b…

MALICIOUS

PDF

123.5 KB Created: 2020-08-31 06:38:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3333716e17f1be963dbb2ef1e25e19d3 SHA-1: 80bb2af3658d17cb757dd456d548920af4f0b73a SHA-256: 02e3da2fbdf1b45b2449053f2a855e84b7e92a485365cee0bcfd7de598dba2e9
154 Risk Score

Malware Insights

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

The PDF contains a link to `ttraff.com` which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to a movie title, combined with metadata indicating it was generated by `wkhtmltopdf`. The presence of numerous external PDF links suggests a link farm or SEO spamming operation.

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.com/wix?keyword=kamasutra+sherlyn+chopra+full+movie
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_7a632ee9836d48e6bec1a7a2dcf40888.pdf
    • https://static.usrfiles.com/ugd/3d0627_f0ad164fbb5242bf91bfca51069ccd19.pdf
    • https://static.usrfiles.com/ugd/83d902_6d8ee4d63b7945c5b116041d78308619.pdf
    • https://static.usrfiles.com/ugd/b8c837_e75a61ade84b4443b4883b0f28c711f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_0887dcaaabfa42f485b4679c9130eee4.pdf
    • https://static.usrfiles.com/ugd/e6092c_788d62266fd54ff7b0f7067d8892599d.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed53b94e21e94681ae25d443e1e35e7d.pdf
    • https://static.usrfiles.com/ugd/724fb5_00406bf851a540059305a9520a0c541e.pdf
    • https://static.usrfiles.com/ugd/89064d_41d51f6250564b6a8659742dfad71a22.pdf
    • https://static.usrfiles.com/ugd/a107db_0b3a18a723f84bc08de2f03a28a01e42.pdf
    • https://static.usrfiles.com/ugd/895bef_24257e6cff164b14883d25749bc37d22.pdf
    • https://static.usrfiles.com/ugd/63d3ad_c2ced791c21d4700813cf022bb496b02.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a77fbba861a436f9ccbe225fd91bce4.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_off00019d35.bin
d12032a4b6837c7b098caf01ccedc60eb1a1cd1b8a486a36dd514c51b40c6794
pdf-font-stream PDF embedded font (sfnt) at offset 0x19D35 5384 bytes
font_01_sfnt_off0001af78.bin
436da1e17dac818b738b87bfd9e3d620d703caa6dda8e93059df97497189b15e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF78 15776 bytes