Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5a57bfcc93f94c9…

MALICIOUS

PDF

41.2 KB Created: 2020-08-16 13:38:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 569ba208f1e813b9e88c89e2cfe3dcc2 SHA-1: 4e70fe1661da1472a9e31a89b8183d5e9495a4b5 SHA-256: f5a57bfcc93f94c9d10fe08628716a0d5121619b1f5659cb9c94f29d5f5987a6
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=backflip+stunt+video', is flagged as malicious, suggesting a redirection to a harmful site. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in the attack. The presence of multiple Shopify-hosted PDF links, while individually benign, contributes to the overall link farm characteristic.

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=backflip+stunt+video
    • http://mowoxokok.nancyhallock.com/uploads/1/3/1/4/131438079/7768e.pdf
    • http://sukevil.fbcathome.com/uploads/1/3/0/7/130774965/mamorafoz-povufume.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49090326843.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7181/files/fovedojele.pdf
    • https://cdn.shopify.com/s/files/1/0437/6238/5045/files/free_printable_2020_monthly_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0434/2965/8790/files/c_est_il_est.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/lubosawulojo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/dovexuwebakodipizul.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4070/files/togokubijono.pdf
    • https://cdn.shopify.com/s/files/1/0432/2715/2539/files/lifawexojugilobisegaxezi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5439/0687/files/34661910063.pdf
    • https://cdn.shopify.com/s/files/1/0431/1721/5905/files/gujazadogabefukugejob.pdf
    • https://cdn.shopify.com/s/files/1/0434/4571/5109/files/zanuvavekexariwisojoju.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_off00006143.bin
971debc48e04354fbd0fa75b24c1de8c814d7ce00da9ebd79a28a861d69110bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6143 5224 bytes
font_01_sfnt_off00007324.bin
27c54d568a807017ad81225ec165c888c854dda75c71f03852beb1ff9fa5ab3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7324 10820 bytes

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