Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e6d1b80a395759…

MALICIOUS

PDF

70.1 KB Created: 2020-08-10 23:40:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77c360aa8dbc15202dafd86e4bdda907 SHA-1: 3db08d97f02c072cc0d0c97f150f70d0c335fbb4 SHA-256: 31e6d1b80a39575978179855f5ca721fc7a8fca43d67f49933d1aca1f22e0f9c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and a title related to vitamin absorption, suggesting a lure. The PDF also contains a mass external PDF link farm, with many links hosted on Shopify, likely to obscure the malicious redirector. No scripts were extracted from this sample.

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=absorcion+de+vitaminas+hidrosolubles+pdf
    • http://files.linhr.com/uploads/1/3/1/0/131070189/tabotusatoboza.pdf
    • http://files.nhpsathletics.com/uploads/1/3/1/4/131408970/fomizalelu.pdf
    • http://files.papercranesoaps.com/uploads/1/3/0/7/130776661/xevuwozaniru_xufebavonobagi_lubevinov.pdf
    • http://files.wakecountybands.com/uploads/1/3/1/8/131856076/6b0f5b7d0b71.pdf
    • https://cdn.shopify.com/s/files/1/0432/9255/7462/files/favopusisaxepobokozew.pdf
    • https://cdn.shopify.com/s/files/1/0436/3039/5552/files/59988817370.pdf
    • https://cdn.shopify.com/s/files/1/0428/2351/6323/files/online_autocad_converter_to.pdf
    • https://cdn.shopify.com/s/files/1/0433/3889/1419/files/9210328873.pdf
    • https://cdn.shopify.com/s/files/1/0433/6700/6364/files/zavavasited.pdf
    • https://cdn.shopify.com/s/files/1/0437/0812/1242/files/zekam.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/16536112387.pdf
    • https://cdn.shopify.com/s/files/1/0441/1051/2280/files/ets_gre_verbal_reasoning_practice_questions.pdf
    • https://cdn.shopify.com/s/files/1/0432/2328/5928/files/rawupexikojafanuvexa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/34147844456.pdf
    • https://cdn.shopify.com/s/files/1/0429/5501/4298/files/49705625022.pdf
    • https://cdn.shopify.com/s/files/1/0432/8764/2270/files/kalimba_songs.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_off0000d249.bin
7a31bf438537546817a4c9683db6c7249043142ce9506f0b8ece2f68aa853fa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD249 5584 bytes
font_01_sfnt_off0000e516.bin
eb43fe658ef86cd6b5b96c818a1f0045aa230c5ace69570242ab957517e2b8bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE516 11172 bytes

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