Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3acd8187b239c5a…

MALICIOUS

PDF

48.8 KB Created: 2020-08-08 15:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68f636d1b1beb7cb48003cca7031cc5e SHA-1: 0b695250962e3ac9b851ad559df0a99d9ca93bf9 SHA-256: f3acd8187b239c5a08cf14d9ed6255f4c8c06c5617122840871e355d7a0c12db
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 firing indicating it links to known malicious redirector infrastructure. The document body, though partially corrupted, contains text suggesting it is disguised as an 'Application letter example for job pdf'. The primary malicious URL identified is ttraff.com, which is used to redirect users. The file also contains a large number of links to shopify.com, which are identified as a link farm.

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=application+letter+example+for+job+pdf
    • http://files.awesomepawsacademy.com/uploads/1/3/1/4/131453109/gozosawigew.pdf
    • http://files.cliqueticketproject.com/uploads/1/3/1/6/131606345/tukajewebaxotiz.pdf
    • http://files.bannerville.com/uploads/1/3/1/6/131607522/kegixok.pdf
    • http://files.fit4ballet.co.uk/uploads/1/3/2/6/132695701/5377396.pdf
    • https://cdn.shopify.com/s/files/1/0438/3870/1728/files/play_riversweeps_at_home.pdf
    • https://cdn.shopify.com/s/files/1/0447/0459/6122/files/does_discord_record_audio.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/23160807695.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7959/files/steven_skiena_algorithm_design_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/bixonubifewipe.pdf
    • https://cdn.shopify.com/s/files/1/0433/1791/9909/files/limigozoke.pdf
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/autism_breakthrough_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/derurilogulipipilisuvele.pdf
    • https://cdn.shopify.com/s/files/1/0429/4737/9356/files/kazobinosegon.pdf
    • https://cdn.shopify.com/s/files/1/0438/2231/7728/files/zelonajitotuwubonodudi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/10389566168.pdf
    • https://cdn.shopify.com/s/files/1/0433/3145/3081/files/comptia_casp_study_guide_download.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_off000074d7.bin
412b29341957b9c87957807d542491ebe97beeb87e44eb00772aaf0b04f609b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x74D7 5184 bytes
font_01_sfnt_off00008659.bin
0d6968a048abbc80b72eccdb7045eafa0f40042b02dd6807a35a436ade8dea91
pdf-font-stream PDF embedded font (sfnt) at offset 0x8659 9956 bytes
font_02_sfnt_off0000a848.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA848 4324 bytes