Malicious PDF — malware analysis report

Static analysis result for SHA-256 345920091fcf0d1e…

MALICIOUS

PDF

43.2 KB Created: 2020-08-18 18:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85c456715b3b3e153e70dccbc35b9396 SHA-1: eb31eaa9e93bb7fb799ae6453dd1fb7548ee26b1 SHA-256: 345920091fcf0d1e52a90773f7df225c20f0fa05d75140d9782e5396d1946d5e
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.cc. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a mass of external PDF links, with cdn.shopify.com being the dominant host. The document body, though heavily obfuscated, contains the malicious redirector URL and several other PDF links, suggesting a lure to external content. No scripts were extracted from this sample.

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=best+auto+repair+manuals+reviews
    • http://goguduzi.abarthdrivingschool.co.uk/uploads/1/3/0/8/130874493/1490e40a5c6cb.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0165/files/94823619108.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/anarkali_adiye_anarkali_song.pdf
    • https://cdn.shopify.com/s/files/1/0430/3811/3955/files/marathi_to_english_barakhadi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/administration_publique.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/41491044487.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/pathfinder_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/xegimikaxubidulalot.pdf
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/viwim.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/41852718380.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_off00006c1f.bin
dac7f05b677a399f20ef03f60db484ed87962b8108b7a5f9edd7c67b88d7b46e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1F 5168 bytes
font_01_sfnt_off00007dab.bin
fde257e206a6182692549c6e33c95bdefeff55d187d95f4ba0dca2ad1cc7f78d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAB 10184 bytes

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