Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9a3dee7452dc8ab…

MALICIOUS

PDF

45.5 KB Created: 2020-09-03 10:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87df716be9ae5937642cbaeed977d0a0 SHA-1: 7cb6439e28f2703b6fa032f34549ad86c2e876a7 SHA-256: f9a3dee7452dc8ab214a0dd4a701884cb1a838784705a7f31fed9f6b2829ea76
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation to increase visibility of the malicious link. 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/wix?keyword=pokemon+alola+region+game+gba
    • https://static.usrfiles.com/ugd/d99ef3_3ff53953ef794e26aca5c0374845d029.pdf
    • https://static.usrfiles.com/ugd/7dd30d_1c308316d43146a5a7f56b0ae4c59eaf.pdf
    • https://static.usrfiles.com/ugd/599f1c_a8e47300a440447696108c4b306ebf87.pdf
    • https://static.usrfiles.com/ugd/b8c837_35abd24c862d4319b7e29aed266c0f7d.pdf
    • https://static.usrfiles.com/ugd/b77b08_f1afeacb27b9401e87044c9db945fedd.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0294/files/file_nng_khng_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0431/0486/2374/files/sugafavovopaguwegi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/star_wars_rogue_one_full_movie_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/4680/5404/files/kozarojamufuvexifilup.pdf
    • https://cdn.shopify.com/s/files/1/0439/3402/3848/files/83252003574.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/gutawob.pdf
    • https://cdn.shopify.com/s/files/1/0434/1399/5672/files/topon.pdf
    • https://cdn.shopify.com/s/files/1/0434/8048/1954/files/musotaxamulojonijepa.pdf
    • https://cdn.shopify.com/s/files/1/0452/7711/8625/files/wowudupabirisokovupemi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2940/4567/files/91536443082.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_off000072ef.bin
24452c9e3e577b180252f880141361caa2c51fb786d91a1bca1b740b0a65948e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72EF 5032 bytes
font_01_sfnt_off000083fe.bin
e143a1c7b77252ebee0f4319991c056f74ffd165ad622a7756de37828732f66c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83FE 11440 bytes

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