Malicious PDF — malware analysis report

Static analysis result for SHA-256 34642fd6ce67ed8f…

MALICIOUS

PDF

50.5 KB Created: 2020-08-12 15:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9b28444a817550f15e1bc72c76bdf8a SHA-1: 8fb62bdc5b1dd3f9a0a63fa580d5d093aed00b1c SHA-256: 34642fd6ce67ed8f4c7dc5e093168f8f4edfb78384b471d8a5b9ceb1d312c068
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 embedded links, many of which point to Shopify domains hosting other PDFs. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves redirecting the user through 'ttraff.ru' to potentially 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.ru/pify?keyword=bread+making+book+pdf
    • http://files.afropanamanian.com/uploads/1/3/1/6/131606349/e7c52b788f10ed9.pdf
    • http://files.hmssurveys.co.uk/uploads/1/3/2/8/132815206/ximaji.pdf
    • http://files.navigatealzheimers.com/uploads/1/3/1/4/131406337/pisamoxuxitemaxiku.pdf
    • http://vidojol.genevabeautyusa.com/uploads/1/3/1/4/131453133/garuxojitoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4637/9426/files/12322074634.pdf
    • https://cdn.shopify.com/s/files/1/0438/0921/0528/files/ffmpeg_mov_to_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9180/files/34880119779.pdf
    • https://cdn.shopify.com/s/files/1/0435/5234/2184/files/pathfinder_bestiary_3.pdf
    • https://cdn.shopify.com/s/files/1/0438/3450/7426/files/modern_architecture_history.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0758/files/pevonafutogi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3861/2378/files/pokimewotokodisop.pdf
    • https://cdn.shopify.com/s/files/1/0437/5710/9402/files/43713180853.pdf
    • https://cdn.shopify.com/s/files/1/0431/7177/4615/files/iso_burner_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/85145846025.pdf
    • https://cdn.shopify.com/s/files/1/0435/9494/0573/files/13140144640.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_off000080e6.bin
45ca67f7242b9607878bb4750b7f36e5b95b9a35fdd38802ac50efd84ce8f1d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80E6 5404 bytes
font_01_sfnt_off0000932e.bin
0640eb5c96c95a80727ed2b981027d812007ed08e5520fb9b415fabb328b7ac0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x932E 13452 bytes

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