Malicious PDF — malware analysis report

Static analysis result for SHA-256 4101ebadd5439910…

MALICIOUS

PDF

49.4 KB Created: 2020-08-05 02:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53f339ffbe48f5cb2aaa4d090d84bcbe SHA-1: 95739f975048989adf42392522f89a92bba4e779 SHA-256: 4101ebadd5439910bfd857295473d5be17dd1a49902bf66b64f29ca2200df1c1
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to benign Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This redirector is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=arrhythmia+causes+pdf', suggesting a lure related to medical information to entice clicks.

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=arrhythmia+causes+pdf
    • http://files.thetrashtalkblog.com/uploads/1/3/1/3/131379820/4068510.pdf
    • http://files.changinglungcancer.com/uploads/1/3/0/7/130740210/vukafinuwaliwe-titazidegovif-maxoxosemuwoxa-modeze.pdf
    • http://files.thefilamentstudio.com/uploads/1/3/1/6/131606035/fakesijerisaz.pdf
    • http://files.kodamaforestschool.com/uploads/1/3/1/4/131453084/a067716d1c565d9.pdf
    • http://files.wrigg.org/uploads/1/3/2/6/132695445/6562426.pdf
    • https://cdn.shopify.com/s/files/1/0433/8611/0110/files/design_patterns_in_java_with_realtime_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2962/files/65048718550.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/sejapazesowo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2461/1478/files/tilekinemumal.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/85289648018.pdf
    • https://cdn.shopify.com/s/files/1/0435/0253/4822/files/american_slang_words.pdf
    • https://cdn.shopify.com/s/files/1/0433/8706/0375/files/sajizumobubuwab.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/rapogodulolej.pdf
    • https://cdn.shopify.com/s/files/1/0429/2168/9254/files/91376147911.pdf
    • https://cdn.shopify.com/s/files/1/0434/6032/9637/files/laritem.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7112/files/31055684412.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gaxedisurerikemamezawapux.pdf
    • https://cdn.shopify.com/s/files/1/0432/5002/4603/files/ielts_writing_task_1_samples_band_9.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7670/files/44383153715.pdf
    • https://medlineplus.gov/arrhythmia.html
    • 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_off000083bb.bin
8e6d6816ff312af4bdbdab42eaa2e1ab6b6e44865391bf488105fe87ab08b068		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83BB 5456 bytes
font_01_sfnt_off00009625.bin
36385ee4211c3e419d4c61a8e4f51f20614b35bca31e764221e8c531c6a23dbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9625 10068 bytes

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