Malicious PDF — malware analysis report

Static analysis result for SHA-256 2616e1b084888a31…

MALICIOUS

PDF

71.7 KB Created: 2020-07-30 23:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6679dd1163f28e57e78a7be476aa8eb SHA-1: f8525ae9abbfae0ffba9653865cc4e28264eb4de SHA-256: 2616e1b084888a31c03daaf1a262b874ca6094f01467b9c4dad67f801361a755
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering, directing users to a potentially harmful external site.

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.ru/pify?keyword=accounting+conventions+and+standards+pdf
    • http://files.theroute92.com/uploads/1/3/0/8/130873973/zuguxizamuri.pdf
    • http://files.utopianetworkofficials.org/uploads/1/3/1/4/131407952/1584114.pdf
    • http://files.baobabtreestudio.net/uploads/1/3/1/1/131164052/zumuziruxitiku.pdf
    • http://files.voiceofhoperct.org/uploads/1/3/0/8/130814043/a95aa16e3da4.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/91882521548.pdf
    • https://cdn.shopify.com/s/files/1/0432/1620/8036/files/50782751364.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/13684179740.pdf
    • https://cdn.shopify.com/s/files/1/0434/4591/1709/files/10130349478.pdf
    • https://cdn.shopify.com/s/files/1/0431/5611/1520/files/mabipene.pdf
    • https://cdn.shopify.com/s/files/1/0433/1952/5531/files/61152632185.pdf
    • https://cdn.shopify.com/s/files/1/0433/7840/9639/files/wapazexix.pdf
    • https://cdn.shopify.com/s/files/1/0431/2979/8818/files/14537965648.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vibemegabixowosepabotabux.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_off0000dcb2.bin
1e51272af12afe2699ebae0f59082ad58c37a9618e8d66ff08c5a22c94f2596c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB2 5224 bytes
font_01_sfnt_off0000ee86.bin
be93ba795391ba5c4e4d3d06401abbf008c0927ff775ca2dfe2385c94e90df67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE86 10336 bytes

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