Malicious PDF — malware analysis report

Static analysis result for SHA-256 288aa728a56e72db…

MALICIOUS

PDF

50.0 KB Created: 2020-08-23 11:18:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bba8baefdbfa38c6a87861aa6aa0ff15 SHA-1: dc5bcb313012dd3accd8e9c4af0ab557d3e378e6 SHA-256: 288aa728a56e72dbb9848561b0a4433acb1a23123b7e9173442ae177166d05db
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 `https://ttraff.com/pify?keyword=pathfinder+brawler+optimization+guide`. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to `https://cdn.shopify.com/s/files/1/0428/9812/9062/files/29896200227.pdf`. The document body, though partially corrupted, includes text related to an 'optimization guide' and the malicious URL, suggesting a lure to a malicious site.

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=pathfinder+brawler+optimization+guide
    • http://files.nducuwangugi.com/uploads/1/3/0/9/130969555/gimuviri-megatanizus-selusifo.pdf
    • http://files.mossandginger.com/uploads/1/3/0/7/130739284/jebefiwewolator.pdf
    • http://files.achapeyama.com/uploads/1/3/2/3/132303134/20b5523.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9062/files/29896200227.pdf
    • https://cdn.shopify.com/s/files/1/0435/1793/5770/files/83791439775.pdf
    • https://cdn.shopify.com/s/files/1/0450/3640/4900/files/naming_amines.pdf
    • https://cdn.shopify.com/s/files/1/0428/0372/4455/files/36547319337.pdf
    • https://cdn.shopify.com/s/files/1/0443/0423/6700/files/f0_9f_98_ad_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3813/files/kaloxuvekaxegavokapi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6484/2657/files/sejepat.pdf
    • https://cdn.shopify.com/s/files/1/0436/7027/4201/files/italian_food_menu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0792/files/42828084975.pdf
    • https://cdn.shopify.com/s/files/1/0440/4376/3862/files/ropufimefo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/loditovasugeni.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007755.bin
0189a34d22a6a7c4aa49c49c81aa88669e9f5d1e69fc789014032fabebba77a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7755 5440 bytes
font_01_sfnt_off000089b9.bin
d9a7b8785c934e9349ae1a0182b88ec4872ad4dafc9998316a627d65ae0e5377		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89B9 10352 bytes
font_02_sfnt_off0000ad19.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD19 4324 bytes

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