Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf6dde88b1286f6c…

MALICIOUS

PDF

39.0 KB Created: 2020-08-20 18:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7aff7d58f02a53c345caefc4790c24b1 SHA-1: 68a5f4ae55f5b602639be8b74a2832926ab0d8b2 SHA-256: bf6dde88b1286f6c1f583f5d6a6a8c334cb9d8c22bad2ec65356c77f8e775e69
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, a common tactic for SEO poisoning or redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, disguised with the keyword 'fiddling sheet music'. The document body, though heavily obfuscated, also contains this URL and other PDF links, reinforcing the malicious intent. No scripts were extracted, limiting further analysis of payload delivery.

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=fiddling+sheet+music
    • http://files.celestecrystals.com/uploads/1/3/2/3/132303175/6ccd315ab77e03.pdf
    • http://files.theminddeconstructed.org/uploads/1/3/1/6/131606122/vegel.pdf
    • http://files.gertieandruth.com.au/uploads/1/3/1/4/131407226/218c29d6f149.pdf
    • http://kadodevi.adelantechc.org/uploads/1/3/2/6/132682878/siwiruba-lebuduj-bunibuzowiwo-vofuxa.pdf
    • http://files.southpawspetexpo.ca/uploads/1/3/1/3/131379343/gogawiju_bodagedu_nelutubijenup.pdf
    • https://cdn.shopify.com/s/files/1/0433/3296/0409/files/txt_tvox_com.pdf
    • https://cdn.shopify.com/s/files/1/0430/6147/7527/files/begixelovus.pdf
    • https://cdn.shopify.com/s/files/1/0438/5079/3110/files/26465256591.pdf
    • https://cdn.shopify.com/s/files/1/0427/4946/0636/files/nutakumedupofub.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/3172196148.pdf
    • https://cdn.shopify.com/s/files/1/0434/1566/6840/files/83746136863.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/busarukasatobaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4629/files/biochemical_engineering_major_information.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_off00005bc9.bin
a964a1497ca5a8d4736a0577f35fb0e2553facdeb44fedba16b88e3ff135b329		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC9 5000 bytes
font_01_sfnt_off00006ca0.bin
cb24c13b2097c7fb6c4d8849cdf1f01e3c7c7166ffe30e9713dd5f7007177082		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA0 10272 bytes

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