Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ee4ae74b5b7d12…

MALICIOUS

PDF

38.5 KB Created: 2020-08-10 22:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44cf851eb343383f40b498d764ebae5b SHA-1: da6d42a5263ec46cad5ce7b0ae4d63de8a34105f SHA-256: c6ee4ae74b5b7d127efaa39ba1a8f3f53637164e796e30e634324b62ae88b497
120 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the string 'Cahier de vacances pdf maternelle', suggesting a lure to trick users into clicking the malicious link. The PDF also contains a large number of embedded links, many of which point to Shopify domains, but one critical heuristic indicates a link farm, with the primary link being to 'ttraff.com'. This suggests a phishing or social engineering attack aimed at redirecting users to malicious infrastructure.

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=cahier+de+vacances+pdf+maternelle
    • http://jurulav.hearthrobgr.com/uploads/1/3/0/9/130969754/9547894.pdf
    • http://files.havehopeforthejourney.org/uploads/1/3/1/4/131453276/2447945.pdf
    • http://files.jaspercountytiochcommunityassociation.com/uploads/1/3/1/4/131437308/kubuwewuvipawozup.pdf
    • http://files.purposefullearning.net/uploads/1/3/1/4/131408465/mojalujidozazalo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/diamond_amulet_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0434/7235/5478/files/bezuvatiseduxokonel.pdf
    • https://cdn.shopify.com/s/files/1/0432/5077/8275/files/diwokikojorofomobi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0133/9304/files/39703643900.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/7030258804.pdf
    • https://cdn.shopify.com/s/files/1/0438/6550/5952/files/71326385622.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/rofenoxixukuvitololeme.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/6443515091.pdf
    • https://cdn.shopify.com/s/files/1/0433/4210/2679/files/thesis_acknowledgement_example.pdf
    • https://cdn.shopify.com/s/files/1/0439/3598/9928/files/zepug.pdf
    • https://cdn.shopify.com/s/files/1/0437/1664/0923/files/28473206408.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/99609781466.pdf
    • https://cdn.shopify.com/s/files/1/0437/0271/4536/files/advantages_of_social_media_essay.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_off000056bc.bin
377c292c883ffdb060370e75813a355652042a7fa223465b7f522c4ae6a30fde
pdf-font-stream PDF embedded font (sfnt) at offset 0x56BC 5360 bytes
font_01_sfnt_off000068d1.bin
c2defd22998a7c0cd75ec0dcd1ddd74b0e794d64f073a4b8348289d54245f121
pdf-font-stream PDF embedded font (sfnt) at offset 0x68D1 10612 bytes