Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44aad356bc30158…

MALICIOUS

PDF

46.3 KB Created: 2020-08-15 08:39:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abd83886e01fd49a73f58e6b872d7490 SHA-1: 0f645634bf970001b5b202c70ed01497fddced43 SHA-256: e44aad356bc30158cf257dc3dfb9b397fcf437a1847d410094be6b1dd063e11d
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to 'ttraff.cc', a known malicious domain. The document body, though heavily obfuscated, contains references to the same URL and other URLs hosted on Shopify, likely as part of a link farm to improve search engine ranking for malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=sim800l+gsm+module+datasheet
    • http://files.stannersenglish.com/uploads/1/3/1/4/131438069/7411057.pdf
    • http://junekezo.kendrakd.com/uploads/1/3/1/3/131380600/868c345f62.pdf
    • http://files.riverrestoration2018.com/uploads/1/3/0/9/130969241/kukeviwebok-nawumuzomix-weminupise.pdf
    • http://files.kofc5962.org/uploads/1/3/1/4/131438018/5666027.pdf
    • http://gekukosi.conklinstudiopottery.com/uploads/1/3/0/8/130813765/58e46d83.pdf
    • https://cdn.shopify.com/s/files/1/0433/7382/2102/files/gunida.pdf
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/stewart_calculus_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puliwaxaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/1820/7911/files/repair_and_disenchant_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/world_of_warcraft_rpg_dark_factions.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/nixuvero.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/resegenivusoruzobomo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/jidewederewonum.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3924/files/kafimexewisuwokinavuzuv.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_off0000731d.bin
89541a982a897e32b8c1eef0ed4350a2ef2b58db0901cccb6c56eb8333de9e4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x731D 5580 bytes
font_01_sfnt_off000085e2.bin
de8a725abf22335c937ab2aaa2aa305950967c46ba19a85e19841a4c61fc27f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85E2 11316 bytes

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