Malicious PDF — malware analysis report

Static analysis result for SHA-256 e776313c129e8535…

MALICIOUS

PDF

43.3 KB Created: 2020-08-20 13:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afa7a6427425a826fc1d94245f8939f6 SHA-1: 665419372dea266162e6120853dfd554f1320b8e SHA-256: e776313c129e8535e050e2824f756f857674498c4af17f90f794a2177f67ac19
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains, but one specifically to 'sovoropo.tjpalmauthor.com'. The document body, though partially corrupted, contains the same recipe lure and the malicious redirector URL, suggesting the primary intent is to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=receita+de+canap%25C3%25A9+com+p%25C3%25A3o+de+forma
    • http://sovoropo.tjpalmauthor.com/uploads/1/3/2/7/132712324/liforadeji.pdf
    • https://cdn.shopify.com/s/files/1/0440/6693/0840/files/baxuvikudikutaxurokod.pdf
    • https://cdn.shopify.com/s/files/1/0438/6449/0149/files/47970318928.pdf
    • https://cdn.shopify.com/s/files/1/0439/1626/3592/files/tourist_guide_andalucia_spain.pdf
    • https://cdn.shopify.com/s/files/1/0428/6355/8815/files/2061759507.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/19270236937.pdf
    • https://cdn.shopify.com/s/files/1/0431/2537/5125/files/fawanisaxevekom.pdf
    • https://cdn.shopify.com/s/files/1/0432/9062/4158/files/82670347782.pdf
    • https://cdn.shopify.com/s/files/1/0434/7127/4146/files/81252973308.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/51517700583.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/88396000785.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/42824836479.pdf
    • https://cdn.shopify.com/s/files/1/0432/7361/7576/files/9237864542.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/getixasodoropozojasogijo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/super_punch_out_online.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_off0000670a.bin
c39015dc6c73d72e38206d994c5d5afe938879c54b693602304165f911f2ce23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x670A 5556 bytes
font_01_sfnt_off000078fc.bin
c8bd32f2c088e30b2f9998c2edaabad252836d8d3da45c91f8087d8d19db537b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78FC 12008 bytes

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