Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d85d317adfb3a9a…

MALICIOUS

PDF

49.8 KB Created: 2020-08-14 00:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b24783a36173978b9023e9b5c213ed49 SHA-1: c774c8d0cba90db40276416714602fccfbe5a523 SHA-256: 4d85d317adfb3a9a9d7b2890520e56a226027b09f4af7062f20d98132850fb53
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.com'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a fake datasheet. The PDF also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, many hosted on Shopify. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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.com/pify?keyword=grandstream+gxp2130+v2+datasheet
    • http://gixiwu.ctband.org/uploads/1/3/1/4/131437987/952f84.pdf
    • http://files.thewatertank.co.uk/uploads/1/3/1/4/131453028/7419517.pdf
    • http://files.lindveit.com/uploads/1/3/1/3/131397946/2435943.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/37764391928.pdf
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/855-_726-_8721.pdf
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/dowab.pdf
    • https://cdn.shopify.com/s/files/1/0437/9066/3832/files/astral_travel_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6987/files/82411185255.pdf
    • https://cdn.shopify.com/s/files/1/0430/8559/4775/files/gikopata.pdf
    • https://cdn.shopify.com/s/files/1/0429/9728/5027/files/attributes_of_god_catholic.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/1287475193.pdf
    • https://cdn.shopify.com/s/files/1/0438/3653/9045/files/7105545514.pdf
    • https://cdn.shopify.com/s/files/1/0429/1218/6531/files/temolivelu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9303/3111/files/44224119123.pdf
    • https://cdn.shopify.com/s/files/1/0441/2011/3304/files/award_ceremony_script.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_off00008013.bin
ea312f4e89593e549297ccf4f88ad80689b37060dfbf3b8e2d9b79bd617141aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8013 5992 bytes
font_01_sfnt_off00009462.bin
4c085af31f05db758e7ccce1bd98330585f1b97e94b45ccd4cff74beae426902		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9462 11864 bytes

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