Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab71fcf4f249d4cf…

MALICIOUS

PDF

43.8 KB Created: 2020-08-19 16:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 945017cdefc717653f509aeae999c236 SHA-1: 5b5dbc6ccad2d04630b4538f25349871bd14de9b SHA-256: ab71fcf4f249d4cf6187f2ee566ddf2422bdac769aee841492b75b8cdc657293
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, disguised with text related to 'brain teasers worksheets for adults'. The PDF also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic to obscure the malicious redirector. The primary malicious IOC is the redirector URL.

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.com/pify?keyword=brain+teasers+worksheets+for+adults
    • http://files.genuinecollection.ca/uploads/1/3/1/3/131379042/rarafara_fumojazamelupok.pdf
    • http://xedireraf.alekstinapoodles.com/uploads/1/3/1/6/131637309/keruge.pdf
    • http://xewor.rmccartney.com/uploads/1/3/1/4/131438025/7cb1bb0d1b.pdf
    • http://files.neilfoley.info/uploads/1/3/1/3/131398560/mekarudus-tugat-raludujaj.pdf
    • http://files.addictionsss.com/uploads/1/3/1/4/131407406/fugej-letuwalibisumeb.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/12882457098.pdf
    • https://cdn.shopify.com/s/files/1/0437/4839/3112/files/salonokezopebaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/8788/6488/files/16889293474.pdf
    • https://cdn.shopify.com/s/files/1/0432/4818/9603/files/mezijerenusigubawajatit.pdf
    • https://cdn.shopify.com/s/files/1/0433/4786/9850/files/70475664773.pdf
    • https://cdn.shopify.com/s/files/1/0434/5544/7202/files/tapakinakobuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/kiluwitufot.pdf
    • https://cdn.shopify.com/s/files/1/0434/8575/7606/files/26271442476.pdf
    • https://cdn.shopify.com/s/files/1/0433/4921/3349/files/present_perfect_simple_and_continuous_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/7103/5809/files/89829348735.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_off000060a3.bin
19067c6ae6508af5eb6d8ecccd461df9f5daea993de15a7e46b211fa740c4ac5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A3 5084 bytes
font_01_sfnt_off000071ed.bin
417a3a2d0f800413ff261ee8b418aa808e57b69c8a56128d42aabf2f79c68c4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71ED 10060 bytes
font_02_sfnt_off0000945e.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x945E 4324 bytes

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