Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd26eb38021a7b9b…

MALICIOUS

PDF

32.5 KB Created: 2020-08-19 19:27:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 633bec3120c82d6c2d908ec9a0e3eb8a SHA-1: de0feb94e940a4b3d4b7c1d9cec16ff272b4208f SHA-256: cd26eb38021a7b9b21dd00ad53be22ee28f343da1df70f0d0cc939766ffc0cc3
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing its malicious intent. No scripts were extracted from this sample.

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=punctuation+marks+worksheets+doc
    • http://xuweriwaz.classic-speedometers.com/uploads/1/3/1/3/131380550/2263263.pdf
    • http://ramimufim.whereimwearing.com/uploads/1/3/0/7/130776795/pigabumajifavelumoma.pdf
    • http://joviba.faceinthesunlight.org/uploads/1/3/0/8/130874388/luxijulomebawov.pdf
    • http://fiwafot.anroflowers.co.za/uploads/1/3/0/8/130814328/sivememasarupaxekidu.pdf
    • http://files.kikiadami.com/uploads/1/3/1/4/131437064/gonale_xemafa_wijig.pdf
    • https://cdn.shopify.com/s/files/1/0437/7303/4657/files/lexisoforokepevuronom.pdf
    • https://cdn.shopify.com/s/files/1/0432/6532/7262/files/97705098737.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/75692906268.pdf
    • https://cdn.shopify.com/s/files/1/0429/6045/3791/files/90166312804.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8020/files/mijarupefidapufi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/15856505771.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3871/files/suny_albany_campus_map.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_off00004425.bin
e1684f85df69ad2c7e0d8d728f85aa2014aa5dbb3a4b7f2ab22e641e4f060d83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4425 5304 bytes
font_01_sfnt_off00005608.bin
ffc89100102e524e40e7081f2271b15aa6ffc2c6d0ad5983ff75685906f16c1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5608 9236 bytes

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