Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec80e8d689612c6…

MALICIOUS

PDF

41.6 KB Created: 2020-08-09 19:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aef4ceab4c2540dff64b366413720225 SHA-1: e188026e14e0dbec8a14ca6979aec89c0af74396 SHA-256: cec80e8d689612c64b6c84ac6eb1894e4d41245f1205464e7386073f424b984c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains but are likely part of a link farm designed to manipulate search engine results. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=babylonian+numerals+pdf'. The document body itself contains garbled text but also includes the same malicious URL and several Shopify URLs, reinforcing the link farm and redirection attack pattern. No scripts were extracted from this sample.

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=babylonian+numerals+pdf
    • http://maxesej.globehopnow.com/uploads/1/3/1/4/131453870/7062295.pdf
    • http://files.hollygunn.com/uploads/1/3/0/9/130970012/dixesufatepo_dogimu_gonejurud.pdf
    • http://files.elitelaurel.com/uploads/1/3/0/7/130775297/volukogi_bowigot_bupadum.pdf
    • https://cdn.shopify.com/s/files/1/0430/1501/2511/files/38009352730.pdf
    • https://cdn.shopify.com/s/files/1/0429/3197/8403/files/wikafomopojakudedalur.pdf
    • https://cdn.shopify.com/s/files/1/0431/1161/2572/files/wavuwesobez.pdf
    • https://cdn.shopify.com/s/files/1/0436/0201/8467/files/body_beast_workout_book.pdf
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/callan_method_stage_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18842325712.pdf
    • https://cdn.shopify.com/s/files/1/0430/6698/2561/files/75084735651.pdf
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/wiferinumobi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/nisutirosimitifoxataperux.pdf
    • https://cdn.shopify.com/s/files/1/0433/8047/4014/files/3440260130.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/98216238185.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_off0000652a.bin
3f4e38093ad189944f4633f38ec1828ce6d600ebc52b401d7ea5e54d71bf9eab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x652A 5480 bytes
font_01_sfnt_off000077b5.bin
f4084300a0b5a312185fa59d5dc52a3cbec2693b72fed636d38575093960b9d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B5 9992 bytes

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