Malicious PDF — malware analysis report

Static analysis result for SHA-256 78dfdd29d837f2fb…

MALICIOUS

PDF

53.0 KB Created: 2020-08-30 04:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bea4e8e81991960e45088842b4faa86 SHA-1: 39f285701191a271597467bd99e4f3ac9b6c101f SHA-256: 78dfdd29d837f2fb2357ca1bc57f9ec344428310996a7f0e8611d98265d69969
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains references to the same URL and appears to be generated for SEO purposes, aiming to trick users into clicking malicious links. The ML classifier strongly indicates malicious intent.

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=battletech+technical+readout+3039+pd
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/c068f8_8837c244243345d1b8b69d588f8f5b82.pdf
    • https://static.usrfiles.com/ugd/824332_f5068da073814054a5c572ed3ad73c18.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_8d471ebdc7f9441ca29673c684adf0cc.pdf
    • https://static.usrfiles.com/ugd/aef5b7_a98c96c034cd4d9da6c0c6d8d92bc7ef.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b83ba9f52654c109a5396a7da65834f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b57974b2930545c6a1227f7591df3bd7.pdf
    • https://static.usrfiles.com/ugd/9e53d4_bf8168bbf89644e4a14cfcfc1542d077.pdf
    • https://static.usrfiles.com/ugd/48d9a1_09b1dfbeae6249e3b5158ccca7ee3c58.pdf
    • https://static.usrfiles.com/ugd/2274a7_d7065ef3fdf2448abd9b6ceb307b0e10.pdf
    • https://static.usrfiles.com/ugd/0047a4_9d01b26114024c9eaaa3475c0a0b8787.pdf
    • https://static.usrfiles.com/ugd/0789d5_f649676cd3f44a8f97675a240836b586.pdf
    • https://static.usrfiles.com/ugd/b8c837_55d3f6d278d84667b42ec3c2829b52a1.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_d043a5d33ba8483889a2b187957fe4b9.pdf
    • https://static.usrfiles.com/ugd/39cb9d_fefe08df4a8f4b868e2342ad595123a1.pdf
    • https://static.usrfiles.com/ugd/c20ea7_960e0bf1998445acae0d3aa3ec10dbf4.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_off00008540.bin
8aa1363a0e916b0bee2d4be7611b77f70d5045571410b25226786df4f5495bab
pdf-font-stream PDF embedded font (sfnt) at offset 0x8540 5496 bytes
font_01_sfnt_off000097d4.bin
f24f2f1430984fe54f154d9de6c121b6828c39f7118afdfa59866744a7999c7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x97D4 15156 bytes