Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7252ed9e4141e5a…

MALICIOUS

PDF

33.6 KB Created: 2020-08-21 09:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd6487f88fc7ca90946edb1908f5f547 SHA-1: d490d1ce29a32726a024dbb51a4ce1aa72158890 SHA-256: c7252ed9e4141e5a9a07ef19dfea498f29ec38054a71fb24fb350e4dc049f922
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, which is indicative of a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=video+alfy+saga+channel'. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text and a reference to the redirector URL, suggesting it's a lure.

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=video+alfy+saga+channel
    • http://files.saradotyphotography.com/uploads/1/3/2/7/132740278/rulakopuworibi.pdf
    • http://files.gofabusa.com/uploads/1/3/1/4/131407625/visewinuvupaxav_zofasadugovet.pdf
    • http://files.innovationsouthgreenland.com/uploads/1/3/0/9/130969465/nozuwenoz.pdf
    • http://wubofal.thegradcode.com/uploads/1/3/1/8/131857631/nogomenoginaka.pdf
    • https://cdn.shopify.com/s/files/1/0429/7523/2153/files/73949988396.pdf
    • https://cdn.shopify.com/s/files/1/0434/1664/9890/files/nanurenoliwosizipinanesej.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/melevuxefakusafebu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6143/files/80931361158.pdf
    • https://cdn.shopify.com/s/files/1/0434/7294/5312/files/56542710544.pdf
    • https://cdn.shopify.com/s/files/1/0441/2240/7064/files/74350031137.pdf
    • https://cdn.shopify.com/s/files/1/0434/8307/0629/files/kotezolixiwirag.pdf
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/watumifepedifamigix.pdf
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/jakejozusajir.pdf
    • https://cdn.shopify.com/s/files/1/0456/4857/6679/files/bantayan_island_weather_report.pdf
    • https://cdn.shopify.com/s/files/1/0438/9237/5704/files/animals_vocabulary_activities.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_off0000471a.bin
3a349529f20a27eaa8e11d9e8a242976b883c1850a7ff55df8011c10c2c69791		 pdf-font-stream PDF embedded font (sfnt) at offset 0x471A 5252 bytes
font_01_sfnt_off000058fc.bin
f709f7c1ce9b50fd7d6ee1dfe96ef7b6f491a943d7dd38e1f1f287ba11fc0154		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58FC 9580 bytes

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