Malicious PDF — malware analysis report

Static analysis result for SHA-256 234f5eb4d894a261…

MALICIOUS

PDF

41.9 KB Created: 2020-08-30 21:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cab65d100860a2d1f8687106ec38e44f SHA-1: 080b604d1b78eae4a1f4b51c4b5f05471162385c SHA-256: 234f5eb4d894a261a7bb93e49c295e46e73582ef6e414573164d66889b07100d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, including a critical link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the target URL and appears to be a lure related to 'intermolecular forces lab'. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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.ru/wix?keyword=intermolecular+forces+lab
    • https://static.usrfiles.com/ugd/6f7357_7e86e5c411914c90a2cbff9bd65d63d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_258b6445353442d9bddeb6151931ab4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_d387e0ed889c4da19f37f4ee07faba37.pdf
    • https://cdn.shopify.com/s/files/1/0439/4126/5566/files/jajazi.pdf
    • https://cdn.shopify.com/s/files/1/0464/6495/8616/files/51664375595.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/8903073762.pdf
    • https://static.usrfiles.com/ugd/b8c837_408e0eff55044fd68ccb7aff459136fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_abd7ae0231f74153a4cf2db03d9db9d9.pdf
    • https://cdn.shopify.com/s/files/1/0428/5834/8703/files/42965333897.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6908/files/52773383612.pdf
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/77509486603.pdf
    • https://cdn.shopify.com/s/files/1/0436/4160/2198/files/74557676171.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33971068516.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006727.bin
14ba893160e23ebf18d392aafe642dbdc961672a4eeb433b627206a780e40269		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6727 5104 bytes
font_01_sfnt_off00007865.bin
a862dd16b7a3cb32924bef996ebf53b02a6c55e60a8cb5c2858576342ef3d420		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7865 10192 bytes

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