Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba4f15465d5b8ebf…

MALICIOUS

PDF

41.1 KB Created: 2020-08-07 23:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1881a209788398e0a6332a5b75d5fb6 SHA-1: 292c9905a3c2bf391020bbf5278a3947df7aeffe SHA-256: ba4f15465d5b8ebf142b1622f21897eeebbb48b33eaf1737269a56e88e7ed413
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a prominent link to 'ttraff.ru', which is flagged as a malicious redirector. The document body, though partially corrupted, includes the same URL and a title suggesting a lure for users seeking information on PDF forms. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious redirector. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/wb?keyword=how%20to%20fill%20out%20a%20pdf%20form%20on%20my%20mac
    • http://fijedurep.apneaodyssey.com/uploads/1/3/1/4/131438641/1933430.pdf
    • http://files.whitecoatantidote.org/uploads/1/3/1/0/131070604/tupamumizixow_jexuvij_xoromodatowuwe_xawetoneg.pdf
    • http://tozunuk.masterhomeloan.co.nz/uploads/1/3/1/8/131856772/ba7406a.pdf
    • https://cdn.shopify.com/s/files/1/0434/7337/1300/files/64032430718.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4882/files/pupogetimig.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/autotask_training.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/15398608353.pdf
    • https://cdn.shopify.com/s/files/1/0431/8131/0101/files/kejifoxopelokegajibuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2348/2535/files/manuale_apicoltore.pdf
    • https://cdn.shopify.com/s/files/1/0431/1387/3569/files/43934096761.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/diloloviladareledazozap.pdf
    • https://cdn.shopify.com/s/files/1/0438/6547/3184/files/strauss_partial_differential_equations_solutions_manual.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_off00006216.bin
8a9e0bab46cc10b4049e4ddd39966602e45b03c0596b6badf656feb8e36d93d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6216 5280 bytes
font_01_sfnt_off00007411.bin
2fa311683371846bfeaa493e44f98efa4351857c90d6c05d1ece61b4ce583173		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7411 10332 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.