Malicious PDF — malware analysis report

Static analysis result for SHA-256 f58ef3397f190b4f…

MALICIOUS

PDF

40.8 KB Created: 2020-07-07 12:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9146800a48a8e26e2afd9bf03e239c9f SHA-1: 8dd0767a2f1d3d7f1c9d0cc4d4f59ec97a1787c6 SHA-256: f58ef3397f190b4f17d35a26f2e7895999876fedf7acbf678883c3c49cc1e598
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically redirecting to a known malicious domain (ttraff.cc). The heuristic firings indicate this is a malicious redirector and part of a link farm, likely used for SEO poisoning to lure victims. The document body, while containing garbled text, also includes the malicious URL, reinforcing the attack vector.

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/wb?keyword=lara
    • http://files.mrstuckeysclass.com/uploads/1/3/0/7/130776841/4143467.pdf
    • http://files.nlg-pros.com/uploads/1/3/0/9/130969910/katixiratowapo.pdf
    • http://files.cateringandcreations.net/uploads/1/3/0/8/130814513/9295549.pdf
    • http://files.scharencycles.com/uploads/1/3/0/7/130776118/ginukaxezunat.pdf
    • http://files.threecreekaussies.com/uploads/1/3/2/7/132710655/sujut.pdf
    • http://files.sidleystandup.com/uploads/1/3/0/7/130775942/3089407.pdf
    • http://files.vicenzas-crostoli.com/uploads/1/3/1/4/131483253/9062675.pdf
    • http://files.seetheworld.tours/uploads/1/3/2/8/132815961/bawifutopite.pdf
    • https://jefidibodojo.files.wordpress.com/2020/07/4700558757.pdf
    • https://miwezoju.files.wordpress.com/2020/06/xowufaxe.pdf
    • https://suzofosal.files.wordpress.com/2020/06/nunomebazebovipodidaso.pdf
    • https://pisuruvofeja.files.wordpress.com/2020/07/26253667316.pdf
    • https://dafowamu.files.wordpress.com/2020/06/65444480461.pdf
    • https://fumepuwabipa.files.wordpress.com/2020/06/40708908737.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_off0000504b.bin
e3279af794ee1a260b74c4b9ebf804518b82ff17b22359e1966985ab5e1e49da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x504B 5220 bytes
font_01_sfnt_off000061ea.bin
a56d7330c1ce9ca45bf705b877f0acf53a0fa299a3242c958bad808bd1e2692c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61EA 15932 bytes

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