Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4da639c3776f807…

MALICIOUS

PDF

63.8 KB Created: 2020-08-11 13:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d8d3388309257f90a5d8404a2f57848 SHA-1: a5e7b6beff0da3bf4c6335811eb1c0c0e3a09c9e SHA-256: e4da639c3776f80756af74b9f1da70d687c75e33cb55616d96d4be84c54273ca
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm, with many links pointing to Shopify domains, suggesting an attempt to obscure the true malicious destination. The document body, though heavily obfuscated, contains the malicious URL and a benign-looking title, 'Tello ryze user manual', which serves as a lure. The presence of a QR code lure heuristic further supports the phishing pretext.

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/wb?keyword=tello%20ryze%20user%20manual
    • http://files.quieteroahu.com/uploads/1/3/2/6/132681476/6646347.pdf
    • http://files.gofitmama.com/uploads/1/3/1/4/131453543/rivalodewikisavar.pdf
    • http://files.valourmartialarts.com/uploads/1/3/2/6/132696351/kopolebefupix-suwadenugowaxuz-bofaneriniwog-lomokosatag.pdf
    • https://cdn.shopify.com/s/files/1/0437/0612/2393/files/blitzscaling_reid_hoffman.pdf
    • https://cdn.shopify.com/s/files/1/0429/8070/4405/files/memesugapofekodunopotoxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/zalugasiwuxivazunu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/cido_rico_dieta.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7644/files/gmo_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5877/files/pazezapagopeletut.pdf
    • https://cdn.shopify.com/s/files/1/0439/8468/3166/files/bipoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5300/6494/files/97147580716.pdf
    • https://cdn.shopify.com/s/files/1/0429/1543/0559/files/13699624930.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5410/files/54977781829.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/gigiwajap.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_off0000ad3c.bin
d676efdb2af759257d6fdb73ab92a65ec39464efbd3e0ced19e9176dc5d7df2b
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD3C 4688 bytes
font_01_sfnt_off0000bd0b.bin
6effe7acbcc3f9a75d9c384fbd5313a9a712713ae766a0cb3867d0bb3044b132
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD0B 11628 bytes
font_02_sfnt_off0000e41a.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xE41A 4324 bytes