Malicious PDF — malware analysis report

Static analysis result for SHA-256 311f99e3ec473397…

MALICIOUS

PDF

51.7 KB Created: 2020-08-31 08:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8534b1a62a891d7768544d0ccf361b5f SHA-1: 8551085ade9bf863a846f872ce312a3e4ad3ef9a SHA-256: 311f99e3ec47339710bfbd151a70286411e0528699d7af011c2187fc293b29b9
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=bienestar+del+tum'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The primary intent appears to be luring the user to the malicious domain.

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/wix?keyword=bienestar+del+tum
    • https://cdn.shopify.com/s/files/1/0432/1509/3924/files/85581334959.pdf
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/vuzapiledumegag.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3671/files/2004_toyota_solara_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/munojukegawedozetivo.pdf
    • https://static.usrfiles.com/ugd/f65518_6676fe2dddca4f1b902ff97e93596bcd.pdf
    • https://static.usrfiles.com/ugd/735189_752a4897134b44a79b25f0ed2b183d2c.pdf
    • https://cdn.shopify.com/s/files/1/0431/2635/8173/files/13153225389.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/pebaxojoroj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4166/0826/files/letepewujadamopavurop.pdf
    • https://cdn.shopify.com/s/files/1/0435/8999/2616/files/62606285041.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0012/files/bewesetupuxejimojame.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/harry_potter_house_sorting_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5809/files/avaya_phone_manual_9611g.pdf
    • https://cdn.shopify.com/s/files/1/0462/7942/6197/files/libreoffice_combinar_correspondencia_calc.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_off00008a9f.bin
670698bfbc9a8b0e1fb3ba72482b08efdd6d1d51d671232c505b8d5d4ec84c93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9F 5020 bytes
font_01_sfnt_off00009b95.bin
95b2f79657e601f6abb4b165da564302fc38d013d289d2d3f4d3cfc36a048654		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B95 11856 bytes

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