Malicious PDF — malware analysis report

Static analysis result for SHA-256 b944b8d88af9f0d1…

MALICIOUS

PDF

39.9 KB Created: 2020-08-19 08:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f1038d1013457ec05887a9d19d81091 SHA-1: a6e7e06205bf409a05ed51b0efd0edec275222a3 SHA-256: b944b8d88af9f0d1402bb37b7ce38a5330758f0694b2deee772ada8465fce85e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One prominent URL, 'https://ttraff.ru/pify?keyword=private+guided+tours+of+spain', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of a link farm heuristic further supports the malicious intent of directing users to external, potentially harmful, content.

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=private+guided+tours+of+spain
    • http://wosiv.girlbeyou.com/uploads/1/3/2/6/132683024/vesaribo-wesolukepemev-fipamuk.pdf
    • http://keloni.thecareconnector.com/uploads/1/3/1/8/131858540/negadopin.pdf
    • http://files.rutgerscki.org/uploads/1/3/1/4/131406507/5739979.pdf
    • http://womipev.rwjbhinstructors.com/uploads/1/3/2/7/132740185/wosevawaxuvimadejos.pdf
    • http://files.uae350.com/uploads/1/3/1/4/131437806/49073f60d14d.pdf
    • https://cdn.shopify.com/s/files/1/0437/3708/8154/files/certificate_of_incorporation_download.pdf
    • https://cdn.shopify.com/s/files/1/0447/6190/7351/files/calculating_volume_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/3367/3380/files/49510431233.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/ncert_maths_book_download_for_class_8.pdf
    • https://cdn.shopify.com/s/files/1/0436/3363/9584/files/challenges_in_teaching_english_language_learners_in_the_classroom.pdf
    • https://cdn.shopify.com/s/files/1/0437/5917/3790/files/somitagagekama.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/bovesejaraxexugetimeto.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/lean_six_sigma_black_belt_exam_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/4279/8757/files/genonumutixifa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9710/4288/files/temarovutamelex.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_off00005f7a.bin
ead2995d20172bfbc63ca7d1583a00b67dfb44d45280aff046932d0410093d1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7A 5240 bytes
font_01_sfnt_off0000715e.bin
9562dfdd388ff437190766081a4940a9a515b08c461fc98b8021da64abb68bce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x715E 9724 bytes

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