Malicious PDF — malware analysis report

Static analysis result for SHA-256 35577e2fadcd905f…

MALICIOUS

PDF

46.1 KB Created: 2020-08-07 08:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd0391031916b6f702345635c5e64bbf SHA-1: 6623775c2e8e4763587ff5b9f32864d73c24a756 SHA-256: 35577e2fadcd905fc369f0a0ccc48d5770ce7186dfab28d0fd590b73dea22ab5
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'critical discourse analysis example pdf' and a URL that appears to be part of a link farm designed to attract search engine traffic. The presence of a malicious redirector suggests an attempt to lead the user to a harmful site, likely for phishing or malware distribution.

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=critical+discourse+analysis+example+pdf
    • http://files.wincantonchiropractic.com/uploads/1/3/1/4/131411542/melegazularujas.pdf
    • http://files.artsmartmanila.com/uploads/1/3/2/7/132710784/857d8470a3ff82d.pdf
    • http://files.opossumbottom.com/uploads/1/3/1/4/131411762/wugalil.pdf
    • https://cdn.shopify.com/s/files/1/0437/2489/8453/files/zasigenowevad.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9658/files/gokigetome.pdf
    • https://cdn.shopify.com/s/files/1/0437/5199/7592/files/boretuminabizunaxuni.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/rofojoge.pdf
    • https://cdn.shopify.com/s/files/1/0435/5293/1995/files/42334413641.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6491/files/zaragazolalesimizo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8454/files/3789003481.pdf
    • https://cdn.shopify.com/s/files/1/0430/7868/0727/files/titiloguxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1827/files/2877853573.pdf
    • https://cdn.shopify.com/s/files/1/0437/9960/9505/files/77813929166.pdf
    • https://cdn.shopify.com/s/files/1/0434/8461/0712/files/86401106163.pdf
    • https://cdn.shopify.com/s/files/1/0431/6125/6091/files/69333400473.pdf
    • https://cdn.shopify.com/s/files/1/0435/3225/5392/files/36889462208.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_off0000761a.bin
78ab46aa3525623818e4c3b753e227eeb25fcd6d5409b166c64a75a08c4f4f13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x761A 5376 bytes
font_01_sfnt_off00008857.bin
e330edbed209116f0fe4d7d04edad5138bc651a125ec5f53c51037e220fb4248		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8857 10140 bytes

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