Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e7699f32e5ef9b…

MALICIOUS

PDF

43.9 KB Created: 2020-08-02 09:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b90cbd58966d7c349b4c4f2bcd7a4e09 SHA-1: 6b22417f84941e747f7a7e13b8cbb14233df3cbb SHA-256: 54e7699f32e5ef9ba3384738ed031b9e96047754b9f1b936074e3f984c4d1727
150 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=tyranid+painting+guide+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a "Tyranid painting guide pdf". The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or content-spinning operation designed to attract traffic and potentially distribute malware. The ML classifier strongly supports the malicious nature of this PDF.

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=tyranid+painting+guide+pdf
    • http://files.cvchsboosters.com/uploads/1/3/1/8/131856353/xisasozudenani.pdf
    • http://files.sobadagility.org/uploads/1/3/0/7/130776200/zuribinu-dozezodojol-pisugeno.pdf
    • http://files.ameliaseymour.com/uploads/1/3/1/4/131437246/6239298.pdf
    • http://files.mainehunterjumper.com/uploads/1/3/0/8/130813851/617cf44bd6569b.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/88485715240.pdf
    • https://cdn.shopify.com/s/files/1/0429/1647/9132/files/78855691369.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/13125436224.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2465/files/denikisineluletoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/15923568822.pdf
    • https://cdn.shopify.com/s/files/1/0431/1996/8417/files/punk_goes_pop_torrents.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0946/files/mukobenoluwisi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/jozovijatiguxunize.pdf
    • https://cdn.shopify.com/s/files/1/0431/7252/8292/files/99714238868.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3380/files/96518859051.pdf
    • https://cdn.shopify.com/s/files/1/0434/4968/0028/files/lijozaterumozaxer.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_off00006d87.bin
2bfa35de1708c2981f484795347a3725ec08b50ef2782a1ec396e8ea447220e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D87 5048 bytes
font_01_sfnt_off00007ed4.bin
407c767d6d0d57d0e6932c975512fa79b7d45ad1e742c8e5a5a4488e0230b561		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED4 10580 bytes

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