Malicious PDF — malware analysis report

Static analysis result for SHA-256 2779eca69990ec20…

MALICIOUS

PDF

45.4 KB Created: 2020-08-12 22:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0666050b35db04de842111b7e8586a2 SHA-1: 15ceb4c3b859658e7727adbe6d104a9f4171addb SHA-256: 2779eca69990ec20612861f39ad29de80627d81fd7d489757928adf61b72dce6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was identified as malicious by an ML classifier and contains numerous embedded links. One critical heuristic indicates the PDF links to known malicious redirector infrastructure, specifically 'ttraff.ru'. Another critical heuristic flags it as a PDF link farm, with many links pointing to Shopify domains, likely for SEO manipulation to distribute malicious content. The document body contains garbled text but includes the URL 'https://ttraff.ru/pify?keyword=aliments+riches+en+vitamine+k+pdf', which is also flagged as a malicious redirector.

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=aliments+riches+en+vitamine+k+pdf
    • http://gokosuju.fiddlerofstrathspey.co.uk/uploads/1/3/1/4/131437601/7d50b4.pdf
    • http://files.cuestacollegerodeo.com/uploads/1/3/1/4/131483550/f518ae417.pdf
    • http://files.jonathanedgingtonwriter.com/uploads/1/3/1/0/131070113/pujomilun_kepaf_wozukas.pdf
    • http://labov.theimo.org/uploads/1/3/1/4/131483416/wemenijevesovowir.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/rovalemekowadapevoxiruvaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/1248/8348/files/biomass_energy_resources.pdf
    • https://cdn.shopify.com/s/files/1/0431/6010/9210/files/como_aprender_francs_sozinho.pdf
    • https://cdn.shopify.com/s/files/1/0433/2732/4310/files/44449909325.pdf
    • https://cdn.shopify.com/s/files/1/0429/9309/0714/files/xefusolibodemozokat.pdf
    • https://cdn.shopify.com/s/files/1/0429/5137/7049/files/nimofap.pdf
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/ravemomapagerigigufiwof.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/ancient_history_by_rs_sharma.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/50061093540.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4723/files/sadikuxigasifex.pdf
    • https://cdn.shopify.com/s/files/1/0447/0656/2201/files/brainstorming_methods.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/kanujomopufume.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006300.bin
f4bb4b9f914b15835a9ffb244031789378ad2f3de4adb9ad319948f6f8f3d55a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6300 5184 bytes
font_01_sfnt_off0000746b.bin
ce2810967ccdeb2e707f85dacbf376f0d81fd93c43fa2884f14585ddcc9bb7b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x746B 11592 bytes
font_02_sfnt_off000098bf.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98BF 4324 bytes

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