Malicious PDF — malware analysis report

Static analysis result for SHA-256 97abe0cd3c36078b…

MALICIOUS

PDF

49.2 KB Created: 2020-08-23 08:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 638842beff76460d65e494733c380f59 SHA-1: 1f6c0d5cca0bb6aa8c06b5011dfad47c31212060 SHA-256: 97abe0cd3c36078b117eb41cebf664f60fb3b4621b0a7b0c969c685663be8d95
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=free+brochure+templates'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, likely to improve SEO and disguise 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.ru/pify?keyword=free+brochure+templates
    • http://files.thejackedhipster.com/uploads/1/3/1/3/131382470/ff35b4c.pdf
    • http://xunas.helennewsomeart.com/uploads/1/3/0/8/130814328/7017304.pdf
    • http://files.aidbihar.org/uploads/1/3/1/8/131856539/a61257c.pdf
    • https://cdn.shopify.com/s/files/1/0431/8517/6736/files/afro_cuban_grooves_for_bass_and_drums.pdf
    • https://cdn.shopify.com/s/files/1/0429/0484/6503/files/28139147867.pdf
    • https://cdn.shopify.com/s/files/1/0435/5008/1183/files/tambola_tickets.pdf
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/92778430245.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6246/files/sales_skills.pdf
    • https://cdn.shopify.com/s/files/1/0432/4887/7736/files/articulaciones_de_la_rodilla.pdf
    • https://cdn.shopify.com/s/files/1/0431/4405/2885/files/smash_4_legal_stages.pdf
    • https://cdn.shopify.com/s/files/1/0434/4066/8838/files/38452575556.pdf
    • https://cdn.shopify.com/s/files/1/0433/9010/7815/files/chaos_druids_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0432/4917/2635/files/faniwiponiru.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_off000082b6.bin
a46a49aa8d62a1e086d8e2b35f4d64dd419fcd6a1ce7173d61eb53793401297b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82B6 5268 bytes
font_01_sfnt_off00009474.bin
d9fa9babf415a1454e478f457d75f42a9a7a810634cb95f33428e2ec1cb90d73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9474 10544 bytes

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