Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf97c1cb8ea9c47…

MALICIOUS

PDF

41.3 KB Created: 2020-08-04 21:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c155a062ca24ba87e4d4dbfe7401ef21 SHA-1: d85c1a02e41edef8e6fb22efe72e33be93149d77 SHA-256: edf97c1cb8ea9c47866196df5e81c5880cf2543c755766b542be3ec41b0d7fb7
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to a car model and URLs, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious.

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/wb?keyword=renault%20kadjar%201.3%20tce%20140%20gt%20line%20manual
    • http://files.eganvillerotary.com/uploads/1/3/1/3/131381031/nowow.pdf
    • http://files.skyhighclubcaligroup.com/uploads/1/3/2/6/132681767/gibapeka_tevuvupomido_wowezevuvu.pdf
    • http://files.harmonizelifecoaching.ca/uploads/1/3/2/6/132682655/9709041.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/9177949524.pdf
    • https://cdn.shopify.com/s/files/1/0440/4169/9478/files/kakuxolonep.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/53826692447.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0931/files/17908217892.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/23904075600.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/24509839124.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/lesagusubat.pdf
    • https://cdn.shopify.com/s/files/1/0438/1802/5122/files/jquery_each_continue.pdf
    • https://cdn.shopify.com/s/files/1/0431/3209/2573/files/22936355745.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/padefodejob.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/muviwefutidogaxofabo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3950/7100/files/68779481942.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/950238254.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_off000061c9.bin
6a43a9ed60dcc80f97f21a57bc05bcb372274d8e602328efa7dc879b65c3d8f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C9 5708 bytes
font_01_sfnt_off0000753d.bin
74f2390dacd9a8a25fa2fbc89389403451808db4b2968dcad75e1ad30e339ea8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x753D 10180 bytes

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