Malicious PDF — malware analysis report

Static analysis result for SHA-256 57393d17ee666fd1…

MALICIOUS

PDF

41.9 KB Created: 2020-08-21 22:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4dcd97a0a76316e832bd5ba855c2951a SHA-1: 2ae6ec1f814ead64763f1a5362e70bea7e9e0590 SHA-256: 57393d17ee666fd135e70fccaf5b1e17f6d60bd03d44cedfb39abd6f61c0a5be
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to a 'rab jacket size guide'. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content. The primary malicious IOC is the redirector URL.

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=rab+jacket+size+guide+womens
    • http://jorosef.anti-agingbyrjxjelly.com/uploads/1/3/2/3/132303354/8686563.pdf
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/christmas_song_medley_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vozazugimutiwobawaxuleg.pdf
    • https://cdn.shopify.com/s/files/1/0436/6126/3001/files/da_form_5960.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ridojunewosinojep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9950/5311/files/dallas_arboretum_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6317908028.pdf
    • https://cdn.shopify.com/s/files/1/0429/5468/6630/files/63265075818.pdf
    • https://cdn.shopify.com/s/files/1/0439/1020/1499/files/4165772315.pdf
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/zilapivarodudisufa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46506788711.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_off00006519.bin
90d2c3bff0db23240ec7c0417973cc38d7345f9d228b168f79989f9a4a3845fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6519 5560 bytes
font_01_sfnt_off0000781a.bin
6e548fad029db61f8e983d976347415858084940783b98fbda1b974c9deeba83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x781A 10296 bytes

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