Malicious PDF — malware analysis report

Static analysis result for SHA-256 d591292a0b8c6fad…

MALICIOUS

PDF

40.7 KB Created: 2020-08-17 13:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0da3811613b42366cbbf47bfa85745cb SHA-1: 768ddbe2807793e4252aedf1609056713428db88 SHA-256: d591292a0b8c6fad8d1df9d69a71c9930621ffab59965ff7eeda889bc934c1cb
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a movie title, likely intended to entice clicks. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful sites.

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=pirates+of+silicon+valley+dual+audio
    • http://gixarenug.okgfdhotcpha.org/uploads/1/3/0/7/130774978/1584510.pdf
    • http://files.barcelonaappartement.com/uploads/1/3/2/6/132681783/dopupo.pdf
    • http://files.h2osushi.com/uploads/1/3/1/4/131407089/9656379.pdf
    • https://cdn.shopify.com/s/files/1/0434/0524/6631/files/aluminium_phosphide_poisoning.pdf
    • https://cdn.shopify.com/s/files/1/0429/2316/3801/files/sipivexawosanuwew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/buwukepenarunowara.pdf
    • https://cdn.shopify.com/s/files/1/0436/4910/6073/files/nims_200_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/rinuvile.pdf
    • https://cdn.shopify.com/s/files/1/0431/5152/4008/files/xunenixovusipe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/65701557565.pdf
    • https://cdn.shopify.com/s/files/1/0431/1996/8417/files/vedematiromakoga.pdf
    • https://cdn.shopify.com/s/files/1/0437/0972/6870/files/101_benefits_of_black_seed_oil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0402/6280/files/98866755812.pdf
    • https://cdn.shopify.com/s/files/1/0429/3656/5923/files/66171832847.pdf
    • https://cdn.shopify.com/s/files/1/0437/0196/0854/files/96242350346.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_off0000611d.bin
92ef07837ae2af70c2132694e68c4f1f1f34ddf7b64f7d2aa6067ed0d3dbff77
pdf-font-stream PDF embedded font (sfnt) at offset 0x611D 5176 bytes
font_01_sfnt_off000072cd.bin
8489d621bb133bd4b9556a577270f488b620996b111a437299f7f3d43ac1e153
pdf-font-stream PDF embedded font (sfnt) at offset 0x72CD 10372 bytes