Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5336032a217af15…

MALICIOUS

PDF

36.2 KB Created: 2020-09-01 12:43:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43160a3841235c31193bca8df0951a49 SHA-1: 4fa4d4a9bc497a153c883c6ffca98e6e06bc0f7e SHA-256: a5336032a217af153f2c572c5d2a88bab2e37c4ac987d719077b3bfc49ab81e8
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one critical heuristic identifying a link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text fragments like 'Climax ikon piano sheet' and URLs that suggest a lure to download content. The presence of numerous Shopify URLs, while mostly benign, are part of a link farm strategy. The primary malicious URL is likely intended to redirect the user to a phishing or malware distribution site.

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=climax+ikon+piano+sheet
    • https://cdn.shopify.com/s/files/1/0437/3712/0933/files/49392138766.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5669/files/taxexagivolapadadulid.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/fur_elise_piano_sheet_easy.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/614210219.pdf
    • https://cdn.shopify.com/s/files/1/0437/4488/6945/files/episiotomy_repair_video.pdf
    • https://cdn.shopify.com/s/files/1/0429/9276/3039/files/trusting_god_day_by_day_joyce_meyer_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/4125/0714/files/bejeweled_classic_apk_full.pdf
    • https://cdn.shopify.com/s/files/1/0468/0407/4645/files/37106788805.pdf
    • https://cdn.shopify.com/s/files/1/0431/6286/1730/files/69964592795.pdf
    • https://static.usrfiles.com/ugd/c345b0_2e9989d086904b3cb5ab8ad662bd188e.pdf
    • https://static.usrfiles.com/ugd/48d9a1_bcb328c778594becbe96ceb09aef6a2c.pdf
    • https://static.usrfiles.com/ugd/0a593f_b48d15d6c97b48d6886055107e4b2d5c.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_off0000431b.bin
68b71ced64b7adef72aa94dfde24789026ea34bd85a21b05eb750add8ba09e72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x431B 4280 bytes
font_01_sfnt_off00005226.bin
b4297c0679925898b69f9c156b9d01ac49bdcdb1e36bc3ed2ce4a36e14744987		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5226 5000 bytes
font_02_sfnt_off000062fb.bin
d3fa3de3cd2b612e055432034d26859a39c13f916c196f6fbd5b125edd6508a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62FB 9700 bytes

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