Malicious PDF — malware analysis report

Static analysis result for SHA-256 2238f971ac3d7811…

MALICIOUS

PDF

43.7 KB Created: 2020-08-19 14:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c452f2cc193fc58952e39b8965836fd2 SHA-1: 4acb8e881e03e7cdcb77a358f10ea4ec9321b9d9 SHA-256: 2238f971ac3d78118c9df23cb820473d4025fcea06bd2790d1225ebde570f0a6
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a tactic of SEO poisoning or a phishing lure, aiming to redirect the user to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=assistive+touch+android+one
    • http://files.kevinpascalethomas.com/uploads/1/3/1/3/131384098/vebapabimuta.pdf
    • http://files.capetowndaytours.net/uploads/1/3/0/8/130874629/bugob-bowon-jozopo-vudux.pdf
    • http://rerenak.geraldineschubert.com/uploads/1/3/2/6/132681352/9447336.pdf
    • http://files.poehaku.com/uploads/1/3/1/6/131607239/ab7f23f.pdf
    • https://cdn.shopify.com/s/files/1/0433/4695/2351/files/alteryx_free_trial.pdf
    • https://cdn.shopify.com/s/files/1/0438/2015/5037/files/44896186076.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/voxamozadukejagopu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/26903246444.pdf
    • https://cdn.shopify.com/s/files/1/0434/4764/8406/files/16750326665.pdf
    • https://cdn.shopify.com/s/files/1/0447/5827/0106/files/client_service_associate_interview_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/72340444422.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/pleomorphic_adenoma_of_palate.pdf
    • https://cdn.shopify.com/s/files/1/0432/6588/4323/files/detailed_lesson_plan_in_english_grade_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/9816/8727/files/68122420744.pdf
    • https://cdn.shopify.com/s/files/1/0437/4682/0245/files/hidden_animal_picture_puzzles_with_answers.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_off00006d4f.bin
6ad24f74e251e2075547bed18a7f9a909f21a795e639676b428a083c1d3a7eb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4F 5044 bytes
font_01_sfnt_off00007e6d.bin
6b995c0e164800a0c420a8e3b25142a3c093de1810c073e88a70b860246c842e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6D 10364 bytes

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