Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f39e01dc8237af…

MALICIOUS

PDF

60.6 KB Created: 2020-08-22 21:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94dfc083901d3910f3ecc6d9030365b5 SHA-1: ee459ff5b401a9f4e4a07fc5230480385bda98ad SHA-256: 89f39e01dc8237afac9ea5cbc6729df7d30cd7849c202aa1ab2bd8bd194a33ba
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external PDF links, with a significant portion hosted on Shopify. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=coronary+angiogram+guidelines+pdf', is flagged as a malicious redirector. This suggests an attempt to lure users to malicious sites or to manipulate search engine rankings. No scripts were extracted, and the document body was heavily obfuscated.

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=coronary+angiogram+guidelines+pdf
    • http://xapir.rileysgymnasticsacademy.com/uploads/1/3/1/4/131407435/fisixigegajo-zunelupuf-jukigenotesiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/bikini_body_guide_training.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/aryavarta_chronicles_kurukshetra.pdf
    • https://cdn.shopify.com/s/files/1/0437/7922/7810/files/vobamelixuzavolefoliweb.pdf
    • https://cdn.shopify.com/s/files/1/0439/3703/8494/files/fodefide.pdf
    • https://cdn.shopify.com/s/files/1/0430/9221/3911/files/sensory_integration_and_the_child_ayres.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/dozudigomumidoserike.pdf
    • https://cdn.shopify.com/s/files/1/0430/1484/8671/files/20472959218.pdf
    • https://cdn.shopify.com/s/files/1/0431/3029/0327/files/tigidowigoxojozatitufu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2248/2582/files/87740810564.pdf
    • https://cdn.shopify.com/s/files/1/0437/2270/2999/files/tomoboxumetezeruriko.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/dejagegigibusakerefox.pdf
    • https://cdn.shopify.com/s/files/1/0432/7732/0352/files/how_many_abortions_are_performed_annually_worldwide.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_off0000ab6a.bin
f3fe243bcd6e639e11b09967c0ade09afb406b8b13a5139e9a18385116e5e4dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB6A 5368 bytes
font_01_sfnt_off0000bd9c.bin
0963fc2789c6a51d6623d74d966d4f7553499d72fe4af17338b3f1a71f49c2ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9C 12412 bytes

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