Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7a13f8ab4c6f767…

MALICIOUS

PDF

41.8 KB Created: 2020-08-18 16:38:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c6663cabdc1af62e5b47b3fb862170f SHA-1: a83139a4dba696dcf440fd8ebbac68a7eff0784e SHA-256: c7a13f8ab4c6f7670f5f354d175eab82659460a8a1eed7dbb16cdff65bb1919f
160 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document also includes a lure suggesting it is a password-protected archive, a common tactic to bypass gateway security. The embedded URL 'https://ttraff.com/pify?keyword=aac+audio+file+cutter+free' is a strong indicator of malicious intent, likely serving as a first-stage redirector to a more harmful payload.

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.com/pify?keyword=aac+audio+file+cutter+free
    • http://files.bobwarrenphotography.ca/uploads/1/3/2/7/132712333/moxotigigekaj.pdf
    • http://files.artgoop.com/uploads/1/3/1/3/131398141/segefeliba-rumemekumuga-kamotujapufel-funukusemu.pdf
    • http://files.dashatron.org/uploads/1/3/0/8/130874010/3b3c90212dc763e.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9310/files/14283833080.pdf
    • https://cdn.shopify.com/s/files/1/0431/3969/4741/files/bikini_karate_babes.pdf
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/ravajuji.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34707652888.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/75683959648.pdf
    • https://cdn.shopify.com/s/files/1/0437/4138/0759/files/oxford_bookworms_library_stage_3_kidnapped.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/liwenel.pdf
    • https://cdn.shopify.com/s/files/1/0440/7384/4888/files/arjun_r_meda_new_video.pdf
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/84219220783.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a6f.bin
831e6ef6cef90b41b74701de056dc9bab2920ddcb85f6a020dd3d345fa0bcf9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6F 4604 bytes
font_01_sfnt_off00006a18.bin
7d1d8f4d9f2a342d3f4bd5fdf43ab381bc50a7ae48aa80ce4fa16958447bbd7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A18 10112 bytes
font_02_sfnt_off00008ca7.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA7 4324 bytes

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