Malicious PDF — malware analysis report

Static analysis result for SHA-256 b078c04977b9f161…

MALICIOUS

PDF

37.0 KB Created: 2020-08-20 05:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d110b5b3ff1255bf6753968acef7cde SHA-1: 2c2b02afc4d18e657bc72244e3608f378eae59d0 SHA-256: b078c04977b9f16121681487d9edab191ac9e22cb0b7f5277bad168375ec82b3
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body, though heavily obfuscated, contains the target URL and appears to be a lure related to sheet music. The heuristic firings confirm the presence of a malicious redirector link and a link farm, indicating a phishing or redirection attempt.

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=ashokan+farewell+sheet+music+violin+and+cello
    • http://files.naturesintent.co/uploads/1/3/1/3/131398102/fb24656.pdf
    • http://turegu.refugejc.com/uploads/1/3/1/1/131164250/82dc4a92.pdf
    • http://sarusuj.thehomegirltherapist.com/uploads/1/3/1/4/131406071/rugidapofis.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2666/files/82354061761.pdf
    • https://cdn.shopify.com/s/files/1/0432/8757/6740/files/falifadorinenazala.pdf
    • https://cdn.shopify.com/s/files/1/0436/1800/9250/files/63223830748.pdf
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/faretalisuribujijilepot.pdf
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/understanding_symbolic_logic_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/aspects_of_development.pdf
    • https://cdn.shopify.com/s/files/1/0434/4276/5991/files/84188835434.pdf
    • https://cdn.shopify.com/s/files/1/0436/6240/9881/files/deribigiwimaxaxenupudid.pdf
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/voltage_transformer_220v_to_110v.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_off000050a8.bin
11f84aebe3a2f3e10a41403ede56c698501460052d4c1496fcece80429981b82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50A8 5468 bytes
font_01_sfnt_off00006326.bin
cf206501b455d2ebeb77c72a1cbf6073de53e5c0f3c60e5e459c25ad9182a669		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6326 10464 bytes

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