Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bb3f9e6639c2b8f…

MALICIOUS

PDF

35.9 KB Created: 2020-08-07 09:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 043a06bbe83771392d126c3ea1c245eb SHA-1: 7de26d02ff5eac61393767859208c4190c17592a SHA-256: 4bb3f9e6639c2b8f52f955f1f4da5466fecb6bdc7877c1d33d866ef70d90c433
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=arun+sharma+verbal+ability+pdf'. Another critical heuristic identified a large number of external PDF links, suggesting a link farm. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same suspicious URL.

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=arun+sharma+verbal+ability+pdf
    • http://farap.ashworkerstraininghub.com/uploads/1/3/0/9/130969060/3163117.pdf
    • http://fuzukumop.matthewshirrell.com/uploads/1/3/1/6/131636725/taludukimige_xoramemerunades.pdf
    • http://files.copsintransition.com/uploads/1/3/0/7/130739169/7564145.pdf
    • http://files.tlcnashville.org/uploads/1/3/0/9/130969551/kepito.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9189/files/muludiguriwuvot.pdf
    • https://cdn.shopify.com/s/files/1/0427/4552/8487/files/human_eye_and_camera_comparison.pdf
    • https://cdn.shopify.com/s/files/1/0440/8085/7253/files/893878584.pdf
    • https://cdn.shopify.com/s/files/1/0436/6493/3014/files/22164778852.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/19047505340.pdf
    • https://cdn.shopify.com/s/files/1/0433/1402/0505/files/rawagimap.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/65511028556.pdf
    • https://cdn.shopify.com/s/files/1/0436/0064/2211/files/93424734602.pdf
    • https://cdn.shopify.com/s/files/1/0429/9970/9855/files/wofututupabogonug.pdf
    • https://cdn.shopify.com/s/files/1/0447/9467/5357/files/stereo_love_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0429/8961/7311/files/74533118771.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/74760052632.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/68535492398.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_off00004c88.bin
63198c4b5da14651b7da43fd16ce8242b882d76ac7c339a6404508880266b502		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C88 5572 bytes
font_01_sfnt_off00005f5a.bin
7a964571f6bf6bbbda8766f7f1ebd7034ea4596da9704e5fc24571ddf6535c1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5A 10472 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.