Malicious PDF — malware analysis report

Static analysis result for SHA-256 e894bb46c5be1b4d…

MALICIOUS

PDF

36.3 KB Created: 2020-08-03 06:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e300d8d492f1b3e25377876abafa18c SHA-1: 82da275b4b8fc788e16e04db816072fb9013fdd1 SHA-256: e894bb46c5be1b4d9a0a59e9a4d84490e59ab0298a01b619c06adb08433f173c
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with many pointing to external PDF files hosted on Shopify. One critical heuristic identified this as a PDF link farm, suggesting a potential SEO manipulation or content distribution scheme. Another heuristic flagged a link to a known malicious redirector, 'ttraff.cc', which is used to obscure the final destination. The document body contains the string 'Who's your daddy lyrics' and references wkhtmltopdf, indicating it may be a lure or part of a larger campaign.

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.cc/pify?keyword=who%2527+s+your+daddy+lyrics
    • http://files.rptpercussionflorida.com/uploads/1/3/1/3/131383373/7969812.pdf
    • http://files.wwemd.com/uploads/1/3/0/9/130969012/gepukin_buporezuwizugaf_kamibiwowigax.pdf
    • http://files.airn.ca/uploads/1/3/0/7/130775013/sapofojiwevineg.pdf
    • http://files.upwellings.com/uploads/1/3/1/6/131607174/c3eb020e.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jerozex.pdf
    • https://cdn.shopify.com/s/files/1/0434/2166/3397/files/fusuvodejad.pdf
    • https://cdn.shopify.com/s/files/1/0431/6931/7020/files/mafiduredejesidanog.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/88739335317.pdf
    • https://cdn.shopify.com/s/files/1/0437/7644/2519/files/lifugekapamagogezo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6566/files/ready_player_one_epub.pdf
    • https://cdn.shopify.com/s/files/1/0440/5726/4280/files/juderejelilivupilijedep.pdf
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/83368819938.pdf
    • https://cdn.shopify.com/s/files/1/0430/5318/7223/files/munchkin_tabletop_simulator.pdf
    • https://cdn.shopify.com/s/files/1/0428/7250/4483/files/vizumigadizize.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/29930840088.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/20862109708.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_off00005193.bin
80c28f6a261ed8f63114d50c89e77504b6b0f6d8859500f90c7751063b5bf956		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5193 5176 bytes
font_01_sfnt_off0000633e.bin
d8b47ca691d5de685f3e15cb8a02c6bcaca94d32d4d3d60e8687d530ea98ceed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x633E 9780 bytes

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