Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae51f21685fc05e0…

MALICIOUS

PDF

39.9 KB Created: 2020-08-12 15:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f02167d0bce57439b4f943be584e7f5 SHA-1: 87f0fdd8c6d9763ab82f0bfe6e3b3705ef6c8280 SHA-256: ae51f21685fc05e09e57c1aa8e51b735145941bf020955b0a86eaba4441894c9
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link to 'ttraff.com', which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=pre+calculus+12+textbook+pdf+alberta', suggesting a lure related to educational materials. The presence of numerous Shopify links, while some are benign, contributes to a link farm pattern, potentially for SEO manipulation or to host further malicious 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.com/pify?keyword=pre+calculus+12+textbook+pdf+alberta
    • http://diposut.plainsedgechiropractic.com/uploads/1/3/1/4/131409090/9597736.pdf
    • http://zinaxu.northcountrypress.com/uploads/1/3/1/8/131871721/fuwomadabeg-pegidifi-sodaxoboxawo.pdf
    • http://files.strongerdaybyday.com/uploads/1/3/1/6/131606335/tudawow.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/41768072628.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12584167006.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/10473407175.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/kuguwidedogafef.pdf
    • https://cdn.shopify.com/s/files/1/0434/7707/4086/files/relox.pdf
    • https://cdn.shopify.com/s/files/1/0437/1018/5621/files/geography_book_by_khullar.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/savovavituxibugum.pdf
    • https://cdn.shopify.com/s/files/1/0434/8782/1984/files/fafizobalusaxilulol.pdf
    • https://cdn.shopify.com/s/files/1/0440/5762/4726/files/send_text_message_from_gmail.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/kirajugabugapivubedukupi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5029/5708/files/solving_algebraic_equations_grade_8_worksheet.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_off000053b3.bin
62639583653e8df43988d7b7d2e89201af9fa42bc007865ba26a3c8b52c12e52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53B3 5604 bytes
font_01_sfnt_off000066d0.bin
d660673b14804e1c644308b35a4ab8a7a4231a95b253dec8102af404e9c591f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D0 13864 bytes

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