Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cede5ec7955178f…

MALICIOUS

PDF

85.2 KB Created: 2020-07-31 07:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae7a806d1d5c8b845103df535046b60f SHA-1: 7b52fe8e58fce93ae4ed0cd4e1d8ac3a14413797 SHA-256: 9cede5ec7955178f870eadd4cb87c9465d28e5c6f76ae135c3d199e8646cd4bb
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to Shopify domains, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains text related to search terms, reinforcing the lure.

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.cc/pify?keyword=gujarati+bhajan+lyrics+in+english+pdf
    • http://files.lmzilker.net/uploads/1/3/1/4/131406390/1212640.pdf
    • http://files.executivechoppers.com/uploads/1/3/0/8/130874615/koximak.pdf
    • http://files.zaialebtahi.com/uploads/1/3/2/7/132740694/1211979.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2779/files/94344420381.pdf
    • https://cdn.shopify.com/s/files/1/0429/1044/9830/files/kokalifokopowuxijofoxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4115/2421/files/kiwizuberefaleximoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6554/8705/files/90726486670.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/vabikuxigum.pdf
    • https://cdn.shopify.com/s/files/1/0435/9428/5218/files/76523925153.pdf
    • https://cdn.shopify.com/s/files/1/0431/1305/4359/files/zusisibomofem.pdf
    • https://cdn.shopify.com/s/files/1/0434/9083/6632/files/11985487377.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8892/files/gidixexupemufuvozofukew.pdf
    • https://cdn.shopify.com/s/files/1/0429/3653/3151/files/59424275130.pdf
    • https://cdn.shopify.com/s/files/1/0433/9580/9431/files/punemopegugisumeveve.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_off00010854.bin
9f40921c874b4983629509d08dff3884a112c5ce3f282a864f142d4a6bbef64e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10854 5536 bytes
font_01_sfnt_off00011b2f.bin
263a5a7542abac0b6a479e489595093ebda4aab2385dbc62ca1826a70cca932d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2F 14428 bytes

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