Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0338783efac0fdf…

MALICIOUS

PDF

49.2 KB Created: 2020-08-25 22:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8049ce32a6a5401305ffba2042c4a33 SHA-1: d5911ed7b1f2f94ca32af67a89df943fb90b48e5 SHA-256: f0338783efac0fdf58355e9a67777cf5a8cdbd587ab025d7a443eac8405026d7
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=pillars+of+eternity+priest'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which point to Shopify domains. The document body contains the malicious URL and a benign-looking URL, likely intended to mask the malicious intent. The primary attack pattern involves redirecting the user to malicious infrastructure.

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/pify?keyword=pillars+of+eternity+priest
    • http://files.spiritualbirthing.com/uploads/1/3/1/6/131606393/xulotiwelogorofiveze.pdf
    • http://files.bakedbyromanos.co.uk/uploads/1/3/1/3/131381374/nogidugikavowujez.pdf
    • http://files.stuffedwithaloha.com/uploads/1/3/1/4/131437736/3bf0e4.pdf
    • http://romuwuxe.friendshipcenterlena.org/uploads/1/3/0/8/130813821/lewuzo-xutabawumeju-kemawagofe-larimovejulewav.pdf
    • http://files.devonvintagecarclub.com/uploads/1/3/2/7/132740805/nerunawa_gadizoku_nanipol.pdf
    • https://cdn.shopify.com/s/files/1/0462/6445/1226/files/development_engineer_resume_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78992801071.pdf
    • https://cdn.shopify.com/s/files/1/0437/4944/1687/files/muxixosidupupimoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9703/8756/files/section_2_quiz_costs_of_production_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/3404/8669/files/nikivewufirefofanifuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1597/files/50030803564.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/voxagotepijepagademolevol.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/felaxipaxefule.pdf
    • https://cdn.shopify.com/s/files/1/0456/4464/4519/files/16400841242.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xugufu.pdf
    • https://cdn.shopify.com/s/files/1/0440/0503/2086/files/css_center_vertically_and_horizontally_transform.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/bank_exam_reasoning_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/2248/2582/files/87740810564.pdf
    • https://cdn.shopify.com/s/files/1/0431/9562/9725/files/29431206348.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_off00008417.bin
f28e843c3ef1867adc0909607290ee824ce8a6ce48bf0cedf457b7a3568d9d81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8417 4996 bytes
font_01_sfnt_off00009526.bin
62c5bc588a8795327ba27164e0b9df5ad6c2b873c90cfafcc32da2143a9c3c29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9526 10072 bytes

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