Malicious PDF — malware analysis report

Static analysis result for SHA-256 55984969afdb1bae…

MALICIOUS

PDF

65.2 KB Created: 2020-08-24 17:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a425fb4733a5dd76a3a4a793a1686d73 SHA-1: 8df6a384745cb513bbf90567764a2ea35186e848 SHA-256: 55984969afdb1bae488dbc44b4b25b8556f27b8e7564fc3b8b3d0d9d2b62e73d
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 'ttraff.com'. This indicates an attempt to redirect the user to a malicious site. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links, many hosted on 'cdn.shopify.com'. The document body, though partially corrupted, contains text related to medical guidelines, likely serving as a lure.

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=sessile+serrated+adenoma+surveillance+guidelines
    • http://files.hullabaloomusicfestival.com/uploads/1/3/2/7/132740415/zikomigop.pdf
    • http://files.ursulawestwood.com/uploads/1/3/1/3/131379510/vuwuxet.pdf
    • http://files.holisticpt.org/uploads/1/3/1/0/131070792/46341fec47deb7.pdf
    • http://tuzus.lakecountyrecovers.com/uploads/1/3/0/8/130814535/medudur.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/82687773996.pdf
    • https://cdn.shopify.com/s/files/1/0431/2950/3901/files/wesulubupuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7971/files/34559335631.pdf
    • https://cdn.shopify.com/s/files/1/0434/1350/4156/files/jopatejifana.pdf
    • https://cdn.shopify.com/s/files/1/0430/2539/9971/files/nice_guideline_heart_failure_2016.pdf
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/gaberojuvosikilotam.pdf
    • https://cdn.shopify.com/s/files/1/0447/4231/2085/files/introduction_to_accounting_and_financial_statements.pdf
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/vonugotu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6133/6471/files/74027478554.pdf
    • https://cdn.shopify.com/s/files/1/0429/3240/4380/files/59748853525.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_off0000b5ce.bin
0efcc7af28bd3d443b36a1a86d01681f63fc84c6c604d7577c8824e5d7a5b258		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5CE 5420 bytes
font_01_sfnt_off0000c819.bin
04efb557b925d8cf3d1bc12ee4bd11ede0724966b7c931351dd6e04a9fe256ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC819 15052 bytes

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