Malicious PDF — malware analysis report

Static analysis result for SHA-256 10ad1f30aeea4841…

MALICIOUS

PDF

44.4 KB Created: 2020-08-04 08:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85ba9d9342ff30a8b6923a372b471550 SHA-1: cd41d82724fe44910021f12dbdcc5b0904756c29 SHA-256: 10ad1f30aeea484196b9ebd62eb58102f73b5ac784cdd61a4c1f7b7353486133
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits a PDF link farm behavior, embedding numerous external links, many of which are hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=entrepreneurship+development+book+pdf+free+download
    • http://files.actamsea.org/uploads/1/3/0/8/130813777/jugizixidomiwaxed.pdf
    • http://files.crueltyfreecuisine.com/uploads/1/3/1/4/131455722/5164090.pdf
    • http://files.eriklamontphotography.com/uploads/1/3/0/7/130739542/begelipalixewagetujo.pdf
    • http://files.military2millionaires.com/uploads/1/3/0/7/130776338/4208728.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/vukexewudazegazotaku.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7976/files/11960928298.pdf
    • https://cdn.shopify.com/s/files/1/0435/2635/7152/files/tixidixewole.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/60555618782.pdf
    • https://cdn.shopify.com/s/files/1/0432/6195/2155/files/zitazawumikopuvutolo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/ganupuronajugov.pdf
    • https://cdn.shopify.com/s/files/1/0431/5542/3396/files/kuromutewepafuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/71443464596.pdf
    • https://cdn.shopify.com/s/files/1/0431/7085/7122/files/heroku_maintenance_mode.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/pusudomopaxuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1294/files/tijelisolapoviguxedoweweg.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fcd.bin
31ced6d5fb2205e3804b7b355d2b60d7af7f8594782ba3f7e0e30d8afdec1863		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCD 5592 bytes
font_01_sfnt_off000072b0.bin
33d80b5e357abfa3ea91f5eff18928953f8e36d8e9a7aea158c838e8ae756dd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B0 2116 bytes
font_02_sfnt_off00007c7a.bin
3b25f50c9ad45830863a153a23bf88f24e9f6dffae0e2e57c217b1c9308c9041		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7A 12236 bytes

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