Malicious PDF — malware analysis report

Static analysis result for SHA-256 25b0761810cb2772…

MALICIOUS

PDF

44.9 KB Created: 2020-08-10 00:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cb15e32c957f987e00fc4f4afc97939 SHA-1: d28f588ea490bb11d0fa8c428e0336741e99872f SHA-256: 25b0761810cb2772c61ec3fd5b60acdc9be78e998fc2eea3c8ad2ee907d9ce57
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external URLs. One critical heuristic firing indicates a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=phylum+arthropoda+classification+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous other links, many hosted on Shopify, suggests a link farm intended to obscure the malicious destination. 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=phylum+arthropoda+classification+pdf
    • http://files.cinkitchallenge.com/uploads/1/3/1/3/131383651/7417951.pdf
    • http://files.weddingdanceworldwide.com/uploads/1/3/0/8/130873895/fuzosuxewadufi.pdf
    • http://files.theheartofgolf.com/uploads/1/3/1/3/131383673/334950.pdf
    • http://files.pierisproject.org/uploads/1/3/1/4/131408970/125264b.pdf
    • http://jedewir.lymarimiranda.com/uploads/1/3/1/6/131607062/7095ad3cc.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/83634250674.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/80246296082.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26965864763.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/girigigamojotebatigaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/1056/3994/files/23915423980.pdf
    • https://cdn.shopify.com/s/files/1/0437/8276/6750/files/technical_interview_questions_and_answers_for_computer_science.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0840/files/common_sense_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/kimebunirijepimemijaxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0731/9974/files/jiduxulazobep.pdf
    • https://cdn.shopify.com/s/files/1/0438/3483/5094/files/ragunevewizug.pdf
    • https://cdn.shopify.com/s/files/1/0432/2420/3424/files/sogajaxuvowalixopi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/84129677506.pdf
    • https://cdn.shopify.com/s/files/1/0429/3646/7623/files/31043640662.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063b2.bin
8615c8a4117ff7146afba6582fbff68112f70034667550f80978dc38cf632691
pdf-font-stream PDF embedded font (sfnt) at offset 0x63B2 5260 bytes
font_01_sfnt_off00007568.bin
899cedb9d58378f3a902c27214be8deff101b03e161e6402992205cbfc298963
pdf-font-stream PDF embedded font (sfnt) at offset 0x7568 10204 bytes
font_02_sfnt_off00009817.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9817 4324 bytes