Malicious PDF — malware analysis report

Static analysis result for SHA-256 92995afa15112bef…

MALICIOUS

PDF

45.3 KB Created: 2020-08-01 04:22:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fc14d676ffdd49c7f562da0fa67a4d1 SHA-1: b685f3d72e87a1a904dbeedd152a3e0b97445f58 SHA-256: 92995afa15112bef45489a98476b1447b3542ccab13809971c0e4cb81fcc3b60
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=heathkit%20hw-101%20manual%20pdf
    • http://files.rosebeehives.com/uploads/1/3/2/6/132681647/3494897.pdf
    • http://files.ltfdelmarq.com/uploads/1/3/0/7/130738765/lewisuzulav.pdf
    • http://files.savagekat.net/uploads/1/3/2/7/132741382/zugarupiximaku_jizifatekesimij_xinew.pdf
    • http://files.belleharborchemists.com/uploads/1/3/1/4/131407823/nezorixox_kusuk.pdf
    • http://files.victoriaghairdesign.com/uploads/1/3/1/3/131398419/001b93.pdf
    • http://www.circuitarchive.co.uk/heath.htm
    • https://cdn.shopify.com/s/files/1/0434/5135/1200/files/fallout_3_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dekafarisajanitid.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40545468116.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/46804156390.pdf
    • https://cdn.shopify.com/s/files/1/0441/2401/2696/files/list_of_professions.pdf
    • https://cdn.shopify.com/s/files/1/0433/1965/6603/files/13441290616.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/25272328115.pdf
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/xavezakasu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/79046285760.pdf
    • https://cdn.shopify.com/s/files/1/0435/8206/2753/files/70205463298.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2341/files/99634499141.pdf
    • https://cdn.shopify.com/s/files/1/0428/4694/5436/files/33153345241.pdf
    • https://cdn.shopify.com/s/files/1/0430/9028/0609/files/21928018270.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_off0000715d.bin
6bc9ec5ed02970abc6fb49bc6af659e0edb3da50ea69307f8f87b867b28db829
pdf-font-stream PDF embedded font (sfnt) at offset 0x715D 5352 bytes
font_01_sfnt_off0000838d.bin
dcbe2ed2b7ed20a60b7867d0f163c77e716ea27771897b0944cd0fd0b1ff6762
pdf-font-stream PDF embedded font (sfnt) at offset 0x838D 10748 bytes