Malicious PDF — malware analysis report

Static analysis result for SHA-256 808de5a28206aede…

MALICIOUS

PDF

42.2 KB Created: 2020-10-11 08:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfd9d24c9aa34759c46ab4e67d41e25a SHA-1: c5301ff2f5739d2b0f27e9af5357bbc74f4183a8 SHA-256: 808de5a28206aede36638a506bfc7fdf9b3aa7a4a3a1eb6e6341d2635809592f
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing for a malicious redirector and a PDF link farm. The document body, though partially corrupted, contains text related to 'unique farmers market ideas' and the authoring application 'wkhtmltopdf', suggesting a lure document. The primary malicious URLs identified are ttraff.club and files.sahja.org, which are likely used to redirect users to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/pify?keyword=unique+farmers+market+ideas
    • http://files.sahja.org/uploads/1/3/2/6/132681144/tojanesepekokodi.pdf
    • http://mukuroxam.averagejoespodcast.com/uploads/1/3/2/6/132682883/xalaboba-mojivazaku-sefez.pdf
    • http://files.eviman.fi/uploads/1/3/1/4/131407704/pofinekowu-mosikumegefuk-doribid.pdf
    • http://files.hmsls.com/uploads/1/3/1/3/131379033/ruzibuzubesejawezo.pdf
    • http://rexox.familyforeveranimalfoundation.org/uploads/1/3/1/4/131483603/padino-vimifusufaf.pdf
    • http://files.beavertonsecuritymi.com/uploads/1/3/2/8/132814768/kilekotu.pdf
    • http://negenidop.rosecitytrombones.com/uploads/1/3/2/7/132712413/jexatedepij.pdf
    • http://petena.marvlindbergmysteries.com/uploads/1/3/1/4/131482975/femaxipakoziliwa.pdf
    • https://site-1037227.mozfiles.com/files/1037227/jenokozabo.pdf
    • https://site-1043965.mozfiles.com/files/1043965/kosumaji.pdf
    • https://site-1048244.mozfiles.com/files/1048244/jutuwurazefinusij.pdf
    • https://site-1042634.mozfiles.com/files/1042634/numogezujos.pdf
    • https://site-1037187.mozfiles.com/files/1037187/jojup.pdf
    • https://uploads.strikinglycdn.com/files/e9730980-8478-41f4-bcdc-5912080d89d7/revimisetixoro.pdf
    • https://uploads.strikinglycdn.com/files/478c9f70-a958-4ea1-a3d0-478dc6a70809/suzonokuxarej.pdf
    • https://uploads.strikinglycdn.com/files/766c8cf0-fcfe-4cf4-9138-6d02ac71dc0e/39925734526.pdf
    • https://uploads.strikinglycdn.com/files/b88cb008-ed35-47bb-b5b6-f91be9f9d9c8/75333377864.pdf
    • https://uploads.strikinglycdn.com/files/b432a13d-c870-47aa-a599-3cc5e91d4123/15311180433.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_off000067f0.bin
1f5b1cb3fcfd7b5c3e68f91802c7cefa1a78892490d99734cad556994115ce05
pdf-font-stream PDF embedded font (sfnt) at offset 0x67F0 5204 bytes
font_01_sfnt_off00007991.bin
4c3908fff93b18ddbf3488cce40c8615948413fcd4c90f1dc5eec36e7b4d848f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7991 10040 bytes