Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa38423d0d676a2b…

MALICIOUS

PDF

35.5 KB Created: 2020-08-17 08:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4af698b30d1c3b1b20052b58dd70bc9e SHA-1: 38d66f7737cf327058bf4e977eca40327a89cf7f SHA-256: aa38423d0d676a2b2a09ad1e2e3cc214cc4ae72684e6fcdafff2ecfa1e4f5844
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=labour+law+and+employment+manual+2017'. Another critical heuristic identifies this as a PDF SEO link farm, suggesting a tactic to distribute malicious links under the guise of legitimate-looking documents. The document body, though heavily obfuscated, contains references to the title 'Labour law and employment manual 2017' and the malicious redirector URL, reinforcing the lure-based attack pattern.

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=labour+law+and+employment+manual+2017
    • http://files.peterschooltasakou.com/uploads/1/3/0/7/130776682/7625747.pdf
    • http://mavexeg.ironsharpeningoursisters.com/uploads/1/3/1/0/131069934/loparikobo.pdf
    • http://files.dommerestaurant.experienceperigord.com/uploads/1/3/2/6/132681398/zawoke.pdf
    • http://files.theinstituteofadvancedmedicalesthetics.com/uploads/1/3/2/6/132682048/lazelotemep.pdf
    • http://fipoluba.wattleandoak.com.au/uploads/1/3/0/8/130874493/wojap-remukumuzekaja-gogof.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9817/files/govawo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/muxomebe.pdf
    • https://cdn.shopify.com/s/files/1/0434/9886/4800/files/a_full_form_of_iso.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3041/files/nekepamabanetolug.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1558/files/26723682369.pdf
    • https://cdn.shopify.com/s/files/1/0434/6553/9741/files/accounting_definition_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/13226962342.pdf
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/welidomubuzed.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_off00004c4d.bin
963ab1c6f039ad9df3acfbc29c0083d56933d6ac2e82c4b8bef6e88ce09ab03c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C4D 5608 bytes
font_01_sfnt_off00005f6b.bin
42ab57b991a713cc19bf46909c12345df7705e71fea2bc895cfc4eda9752ed14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6B 9936 bytes

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