Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a607e3e425e5772…

MALICIOUS

PDF

37.7 KB Created: 2020-08-20 08:39:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32e772b4d87361e9863234e8007a8efb SHA-1: 483dbe236e0344f56bad0453299327b0a1ff251a SHA-256: 9a607e3e425e5772b57114c264e809ffccd7a3bd7ff41abf5f970728ad93b49d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded links, including one pointing to 'ttraff.ru', suggest a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure itself is the delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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/pify?keyword=stonz+booties+size+guide
    • http://files.happyacresfarm.com/uploads/1/3/1/4/131407051/1766752.pdf
    • http://fawelelo.matteaorr.com/uploads/1/3/1/4/131409909/9333205.pdf
    • http://files.pleasantviewcottagesri.com/uploads/1/3/1/0/131070925/zibovu.pdf
    • http://rasogelax.ww2.thumbprintgallerysd.com/uploads/1/3/0/7/130776783/4273311.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0987/files/vawidutikefotakufipot.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7734/files/83455767359.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/37347063439.pdf
    • https://cdn.shopify.com/s/files/1/0431/5227/7670/files/43394629733.pdf
    • https://cdn.shopify.com/s/files/1/0431/6004/3682/files/30606330044.pdf
    • https://cdn.shopify.com/s/files/1/0431/3825/2957/files/anubhavinchu_raja_videos.pdf
    • https://cdn.shopify.com/s/files/1/0434/7428/8793/files/2422085701.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3592/files/tax_administration_definition.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/57511196461.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053b2.bin
ffdcaef5292e4f6faf703fc78e9fac33d6d666f1dc4b6f4c42a08d4e21c605fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53B2 4948 bytes
font_01_sfnt_off00006499.bin
082bde33fa31e72843e79e91bfa4566b9f2df6fa4378bd855c04d6a774035015		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6499 14896 bytes

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