Malicious PDF — malware analysis report

Static analysis result for SHA-256 221b40c8b8bd9cf8…

MALICIOUS

PDF

47.7 KB Created: 2020-08-16 18:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7d94ee0c60de7f865278b9db7e2014f SHA-1: 452b34604e12f588399ee693f25591af92ef347c SHA-256: 221b40c8b8bd9cf89869bfa51ff88890a2d76ba6178b12141b46f53b5c0999ee
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is presented with a keyword suggesting a game guide, likely a lure. The document also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The primary malicious URL is 'https://ttraff.ru/pify?keyword=dawn+of+war+soulstorm+campaign+guide', which is a known malicious redirector. The ML classifier strongly supports the malicious verdict.

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=dawn+of+war+soulstorm+campaign+guide
    • http://zolek.sapritalia.com/uploads/1/3/1/6/131606346/rafepajupu-teridotusaguj.pdf
    • http://files.margeryammon.com/uploads/1/3/0/7/130775698/wotikadarolu.pdf
    • http://kutewuwi.ldvwine.com/uploads/1/3/2/3/132303195/popikudeluzap.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/semi_detailed_lesson_plan_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5805/files/37098766740.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/renewal_passport_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2995/files/sensory_evaluation_of_wine.pdf
    • https://cdn.shopify.com/s/files/1/0431/3989/1357/files/acca_f6.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/62907367691.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jenodilibaxu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2506/2298/files/86995945271.pdf
    • https://cdn.shopify.com/s/files/1/0429/3571/3958/files/sologezurerelevaj.pdf
    • https://cdn.shopify.com/s/files/1/0438/1723/8685/files/twitter_header_template_psd_2019.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_off00007bdb.bin
92d2453058857a055089a21d2843f9d79a948920784f2b0e74a0e6c175b3f078		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDB 5564 bytes
font_01_sfnt_off00008ec4.bin
4e1a34a6d8aaf63cf85581fa7d0d4f81614662c2a501be31a6ff9627791b9da5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC4 10184 bytes

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