Malicious PDF — malware analysis report

Static analysis result for SHA-256 836c2e44cfd4ce9a…

MALICIOUS

PDF

47.2 KB Created: 2020-08-19 07:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba2a4939cd42a87103781d23cfc6b1cc SHA-1: 4a8880455ba9e5d13fc2b08f1a93ad91e8fd3f19 SHA-256: 836c2e44cfd4ce9a4a15aabe467e241e44b103a55876fcc6ac205a07455ec099
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.cc/pify?keyword=beste+navigation+app+android+kostenlos'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. The ML classifier also 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.cc/pify?keyword=beste+navigation+app+android+kostenlos
    • http://files.reddeercabin.ca/uploads/1/3/0/9/130969377/lunaxowudokesarebana.pdf
    • https://cdn.shopify.com/s/files/1/0437/2715/9448/files/budget_speech_2020_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2370/3969/files/80207423822.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/finale_to.pdf
    • https://cdn.shopify.com/s/files/1/0431/8802/7543/files/texuput.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6074/files/rodamevegupubel.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9058/files/xajutimirupexuzapom.pdf
    • https://cdn.shopify.com/s/files/1/0436/0034/7299/files/fundamentals_of_electronic_devices_and_circuits_lab_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7346/9597/files/69215504249.pdf
    • https://cdn.shopify.com/s/files/1/0432/6254/1982/files/acura_tl_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/2437/6227/files/morrowind_graphics_overhaul.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_off00007833.bin
89d5f00725f497d647b8d9543b4448875628a3f1c26c3772058348eaac25399e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7833 5300 bytes
font_01_sfnt_off00008a4c.bin
c22e8010840dc36651d753810b0c091274958ce9bdd66477eef8f2e02ba715c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4C 11260 bytes

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