Malicious PDF — malware analysis report

Static analysis result for SHA-256 307f39ecdc8ae0a8…

MALICIOUS

PDF

43.2 KB Created: 2020-09-11 23:35:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a0b8c8cd5527792d19b521f9b3092de SHA-1: 5034a692ee7d32c3451be6bb5fc675b2e7fcbeed SHA-256: 307f39ecdc8ae0a8d5fecf25e3677afe20f0d2bc8a50cd48b4188acaf8c5eeca
160 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.club/pify?keyword=open+broadcaster+software+for+pc'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files, likely for SEO poisoning or to host further malicious content. The document body, though partially corrupted, contains the same lure text as the malicious URL, suggesting a social engineering attempt to trick users into downloading potentially harmful files.

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.club/pify?keyword=open+broadcaster+software+for+pc
    • http://files.westonathletics.net/uploads/1/3/2/7/132740711/suterixewapedor.pdf
    • http://mulokixuv.lakesideschnauzers.com/uploads/1/3/1/4/131436978/kosisalupo.pdf
    • http://forevod.sabiland.com/uploads/1/3/0/7/130775085/65c77d82072.pdf
    • http://files.puertoricandj.com/uploads/1/3/0/8/130814042/7a67db545ef3.pdf
    • http://files.jcvfitness.com/uploads/1/3/1/4/131438142/8277848.pdf
    • http://files.nrcdubai.com/uploads/1/3/0/9/130969368/pitoliwomone-vomewuv.pdf
    • https://static.usrfiles.com/ugd/b8c837_30e5cc5025a64bebbebfacf31c504f08.pdf
    • https://static.usrfiles.com/ugd/e32576_0b85d32381cb45c5915a6d3eacad3f88.pdf
    • https://static.usrfiles.com/ugd/5c9621_58a85953ba4f40c1ad4a27f4e084dcee.pdf
    • https://static.usrfiles.com/ugd/136d3d_381e74b0f2364611804fa7d9b3129acd.pdf
    • https://static.usrfiles.com/ugd/fdd6c2_f96befaab07244fb974fd159553c1065.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_off00006abd.bin
f707f0b2e9026b1f3c57974040b00b032cd55eb299ed30ecffff02ab828b8f29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABD 5376 bytes
font_01_sfnt_off00007d18.bin
da99c40838fd019df2a7468e9606b95ce356a00d51ab64bd0a044212d432bb5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D18 10420 bytes

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