Malicious PDF — malware analysis report

Static analysis result for SHA-256 584247f028808e05…

MALICIOUS

PDF

864.2 KB Created: 2020-08-12 01:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d026f3854c6746d3264f701383bd7085 SHA-1: dff5fc8ad7033d20a1dd5d333ad4dd93c45c811a SHA-256: 584247f028808e0533ce4493ee1206b0d202de500b65f7d7308805aa75421468
92 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lead users to malicious content. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary mechanism for attack. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6555

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.
  • 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/wb?keyword=noli%20me%20tangere%20tagalog%20full%20pdf
    • http://files.nutritionbylaurann.com/uploads/1/3/0/7/130775912/a4f54adfc33.pdf
    • http://files.ggemergencyshutters.co.uk/uploads/1/3/1/4/131406036/41f2e64630ea.pdf
    • http://lororux.realfoodsgrow.com/uploads/1/3/1/4/131482975/pudevonasogasu_busubo_pafezugabem.pdf
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/pemanimifelibazale.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/nurinozorevekewemifuriz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1028728638.pdf
    • https://cdn.shopify.com/s/files/1/0435/5837/1496/files/56153221416.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/mezakosanojiterumomig.pdf
    • https://cdn.shopify.com/s/files/1/0431/8671/6830/files/missionaries_and_cannibals_problem.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2275/files/dokobovutegojutekopogoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/5517/6097/files/vemafaveji.pdf
    • https://cdn.shopify.com/s/files/1/0430/7622/3129/files/16967595727.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/julius_caesar_english_translation.pdf
    • https://cdn.shopify.com/s/files/1/0430/4030/9402/files/1586790957.pdf
    • https://cdn.shopify.com/s/files/1/0435/8340/6243/files/autocad_plant_3d_2020_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6727/7469/files/pabelofapewomobaw.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_off000d23a8.bin
0c13aec89cfdbf4a840df5cccb9b29ab8a89e1ec14d29df004b46baba9364332
pdf-font-stream PDF embedded font (sfnt) at offset 0xD23A8 5152 bytes
font_01_sfnt_off000d3520.bin
05846c252e6fe0106d54ec630905542a2fe0665f53e97fdbad9b7d22ff7f537f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3520 18500 bytes