Malicious PDF — malware analysis report

Static analysis result for SHA-256 36c8ad46ebeb0934…

MALICIOUS

PDF

36.2 KB Created: 2020-08-18 19:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 109a0f0d1f148777dcb85201969c4cf8 SHA-1: 8c6083b171331a4b42c0d3a3a90a392c6596e2d6 SHA-256: 36c8ad46ebeb0934bfad25b257ce8595301ba536811e7e5b85d1342643b5d98d
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=bus+racing+game++apk', which is designed to lure users into downloading a file. The document also functions as a link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The primary intent appears to be delivering a second-stage payload via the redirector.

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.com/pify?keyword=bus+racing+game++apk
    • http://files.treasured-one.com/uploads/1/3/1/1/131163590/4c26ed5f523.pdf
    • http://files.kalanihighschoolband.org/uploads/1/3/2/6/132682663/6336281.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5625/files/animal_crossing_pocket_camp_malaysia.pdf
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/1622782962.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/defomi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2036/0600/files/wobutexisos.pdf
    • https://cdn.shopify.com/s/files/1/0447/0842/9977/files/nozov.pdf
    • https://cdn.shopify.com/s/files/1/0438/7281/3211/files/rajomewuweteduzujudubi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1140/5986/files/91060645738.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/munofetonak.pdf
    • https://cdn.shopify.com/s/files/1/0440/1872/9110/files/radioactive_aerosols.pdf
    • https://cdn.shopify.com/s/files/1/0435/6908/6619/files/94125265342.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_off00004f44.bin
01f3d7bc8ae814351c6c96e66a27639c3c346267db4023969f5c1eef23867608		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F44 5336 bytes
font_01_sfnt_off00006153.bin
646bc55426d0a1160bf89526b144c7bbd5d6d3ceb9b743099ed035dc716e8d2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6153 10360 bytes

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