Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d171397d4d18583…

MALICIOUS

PDF

37.6 KB Created: 2020-08-03 22:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65f7b12c5bace68cd6fe2a22d124f74e SHA-1: 3bd8b4bd70efe0745ae9495b9b02ea5d1327b028 SHA-256: 1d171397d4d18583a07ffe258d78c9b681ee65fe4614315fa5707f03efa52455
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=diagnostico+ambiental+participativo+pdf'. This indicates an attempt to redirect the user to a malicious site. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in the attack. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious PDF.

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=diagnostico+ambiental+participativo+pdf
    • http://files.southernhighlandsphysie.com/uploads/1/3/0/7/130775241/7f270c28be3.pdf
    • http://files.lapdesignsonline.com/uploads/1/3/0/7/130739831/difaxizakavubozi.pdf
    • http://files.paxchristisa.org/uploads/1/3/2/6/132681558/9597129.pdf
    • https://cdn.shopify.com/s/files/1/0432/5788/8932/files/66667797468.pdf
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/roxosakoludevates.pdf
    • https://cdn.shopify.com/s/files/1/0438/2310/4162/files/weduvagof.pdf
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/27531438235.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4042/files/51100784732.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/xinobaselezugi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/52934704071.pdf
    • https://cdn.shopify.com/s/files/1/0428/9652/3423/files/priority_queue_time_complexity.pdf
    • https://cdn.shopify.com/s/files/1/0430/0875/3827/files/tigotet.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/watotijomezoxavovuwebig.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6415/files/99428571144.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_off00005283.bin
e067be83ed541c061fef813ea67adf2debfa5186612b4d0bab2f92abf441d7c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5283 5676 bytes
font_01_sfnt_off000065cc.bin
465788ef839b196723075488f80ca842ed1552482c32e694d53953b147445cad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65CC 10988 bytes

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