Malicious PDF — malware analysis report

Static analysis result for SHA-256 d780a9ed4f621270…

MALICIOUS

PDF

45.4 KB Created: 2020-07-31 23:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 681da82ac6837b6867b755887f1a4089 SHA-1: 57b80a36d12cbb4e51f26938e78c79c3a3037b70 SHA-256: d780a9ed4f6212703227996204b89694f1b13d72b0d0253a043dda0d66fcf0a6
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including Shopify. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure via the URL https://ttraff.cc/pify?keyword=til+tuesday+voices+carry+lyrics. This suggests a link farm or redirection scheme designed to obscure the ultimate malicious destination. The document body, though heavily obfuscated, contains the same redirector URL and references to external PDFs.

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.cc/pify?keyword=til+tuesday+voices+carry+lyrics
    • http://files.themagicstudio.ca/uploads/1/3/1/8/131857655/fewajajumijupi.pdf
    • http://files.yourpodiatryroom.com.au/uploads/1/3/0/8/130874284/1db99507c2.pdf
    • http://files.protectthegame.com/uploads/1/3/1/3/131383727/6841021.pdf
    • http://files.aineking.net/uploads/1/3/1/4/131406826/2454d3.pdf
    • http://files.lifestylejewellery.com/uploads/1/3/2/6/132695194/903618.pdf
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/zawekexenorutivozijo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepikopu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5638/0574/files/bevapokupa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8930/4477/files/roxafofagarezu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/67523381449.pdf
    • https://cdn.shopify.com/s/files/1/0437/1503/5291/files/43059996228.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2548/files/6574219710.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kerikelamizefebimu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8697/7949/files/60636520348.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/wanodabigenazawazavopaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48695811849.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_off000074a6.bin
4adf5d202be4b42199f1bbac02af2fbb8ce2d2ee91a709dbc5c55424f6323524		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A6 5044 bytes
font_01_sfnt_off000085e9.bin
522e5958efeca1209b11aae5539ffa1632213ae4bade9ef8fd85a4cd221f89c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85E9 10200 bytes

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