Malicious PDF — malware analysis report

Static analysis result for SHA-256 a28b0f78b34f8650…

MALICIOUS

PDF

46.5 KB Created: 2020-08-15 03:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95bfa74933fd002741adb56fa783a785 SHA-1: 19675f4bc312038117b1ee04097d0a723bdc9372 SHA-256: a28b0f78b34f8650625fbb79f0b43987925510e060c851d2e738046ac281c680
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body itself is heavily obfuscated but contains references to the redirector URL and other URLs hosted on content delivery networks and various domains, suggesting a link farm or SEO poisoning attack. The primary intent appears to be directing users to malicious sites through a deceptive link aggregation strategy.

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=flask+admin+override+templates
    • http://files.rustywoods.com/uploads/1/3/1/4/131452840/2128885.pdf
    • http://files.greenwichyouthcenter.org/uploads/1/3/1/4/131437563/db29d375.pdf
    • http://xifof.newyork-homeinspections.com/uploads/1/3/1/6/131606490/4203652.pdf
    • http://files.rathnaguesthomes.com/uploads/1/3/1/4/131453651/7202608.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuvekalododit.pdf
    • https://cdn.shopify.com/s/files/1/0428/6965/3663/files/76084945898.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2040/files/kamofonivikiseguzo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6527/files/cemal_kafadar_between_two_worlds.pdf
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/laxufatufejafugelomapit.pdf
    • https://cdn.shopify.com/s/files/1/0432/5064/7204/files/23859956814.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zofes.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/1501284948.pdf
    • https://cdn.shopify.com/s/files/1/0435/3379/5477/files/morphology_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/vezupowowe.pdf
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/12544115809.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_off00006ff2.bin
cf36ac065fabe0bea4ac6672c59d53bdc60abbb0a339c7a851f17c96a4059cc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF2 5184 bytes
font_01_sfnt_off00008187.bin
bd6135d6111b3d60061ea598d925448c04479701af9423d4a714558f277de29f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8187 14072 bytes

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