Malicious PDF — malware analysis report

Static analysis result for SHA-256 149a883d81d6587f…

MALICIOUS

PDF

53.5 KB Created: 2020-08-21 15:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17acb0a535e0585b9dedbd0d3fb8cab2 SHA-1: 449df112be07b56d1ecc8310428ce0757aa6a38e SHA-256: 149a883d81d6587f2d944d2c4d874e064fa5034a068383aea91f76bd9aeb5255
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, also contains the same URL, suggesting it's the primary lure. The presence of numerous other Shopify-hosted PDF links indicates a potential link farm or SEO manipulation tactic to distribute the malicious content.

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/pify?keyword=industrial+lubrication+oil+analysis+reference+guide
    • http://gowefib.thorsonpto.org/uploads/1/3/2/6/132696067/9dc36ecc91.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2133/4690/files/42341364807.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8330/files/bokaxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0440/3613/files/belodeloluxikuzozijufurik.pdf
    • https://cdn.shopify.com/s/files/1/0435/4909/8148/files/angiografia_carotidea.pdf
    • https://cdn.shopify.com/s/files/1/0433/7968/7574/files/5802095131.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/pixutorelejapo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2562/1404/files/battle_run_coins_and_diamonds_generator.pdf
    • https://cdn.shopify.com/s/files/1/0435/3225/5392/files/83898287154.pdf
    • https://cdn.shopify.com/s/files/1/0435/4945/8591/files/nugakafomugaxonexix.pdf
    • https://cdn.shopify.com/s/files/1/0429/4692/0615/files/composite_functions_worksheet_algebra_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gifowugebivagobawogun.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_off0000921d.bin
72c7e439b220395e6b58e6a7fe5a7133a73fded91bffc90b8b5e50726eef1d47
pdf-font-stream PDF embedded font (sfnt) at offset 0x921D 5368 bytes
font_01_sfnt_off0000a469.bin
c5b1e44721aaf25d2b51163f2c75a04036a8848cfed112666bfc43a15c9c9d47
pdf-font-stream PDF embedded font (sfnt) at offset 0xA469 10924 bytes