Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c407760232147d8…

MALICIOUS

PDF

41.2 KB Created: 2020-07-31 19:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9732640613288254fe7767b9ed1a0a2a SHA-1: 6291f4f761cc04b1d76c5ffcaab79cfaa11e7647 SHA-256: 7c407760232147d8ed8c1e1830a956c33465f85a14737ce2313cdadd964a851a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external PDF links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest an attempt to lure users to malicious content, likely for phishing or malware distribution.

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=dnd+5e+divine+sense
    • http://files.pshigodagirlsfarm.com/uploads/1/3/0/8/130815137/gonikalugazav-safirewoj-jafazebum.pdf
    • http://files.oswegoeastmensxctf.com/uploads/1/3/1/4/131406435/mevumu-kosopijojarosit-metilozitin-bapelu.pdf
    • http://files.womenatworkco.com/uploads/1/3/0/7/130776592/58ef27d7.pdf
    • http://files.onehumanfamily.org/uploads/1/3/1/3/131384635/bafuxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3233/6791/files/xidefobak.pdf
    • https://cdn.shopify.com/s/files/1/0429/9915/2799/files/fiwavopekuvopuzodifipud.pdf
    • https://cdn.shopify.com/s/files/1/0435/9123/7791/files/37565964078.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40545468116.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/84724966887.pdf
    • https://cdn.shopify.com/s/files/1/0436/9920/8346/files/87616814410.pdf
    • https://cdn.shopify.com/s/files/1/0432/7384/6952/files/muloda.pdf
    • https://cdn.shopify.com/s/files/1/0429/8758/5699/files/16874036442.pdf
    • https://cdn.shopify.com/s/files/1/0440/6276/9302/files/74536897113.pdf
    • https://cdn.shopify.com/s/files/1/0440/0083/7782/files/bokaxafonuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7763/2154/files/26901684036.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_off00006746.bin
68eeb2232fd34902b616a398ec2b4b64bdbb2d0414504dd0255eacb561e067e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6746 4664 bytes
font_01_sfnt_off0000774a.bin
529ce6fcf720e573226e9ba22b2d8f9dbdc4eacf0357817b956bc3d945c4f844
pdf-font-stream PDF embedded font (sfnt) at offset 0x774A 9656 bytes