Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a4b245f5818d8fb…

MALICIOUS

PDF

46.7 KB Created: 2020-08-15 10:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c12f5831d89b58af75065ad3665d6885 SHA-1: 0b7af468f863f0a1b7ff7c117d91bb6ffdc342e0 SHA-256: 3a4b245f5818d8fb5fca8170bbff841ecff5235fbf090dd6601f0ce06a84ca16
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a mass of external links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=url_for+jinja+template', which is a known malicious redirector. The presence of numerous links, many pointing to Shopify domains hosting PDF files, suggests a link farm or redirection strategy to obscure the final malicious destination. No scripts were extracted, and the document body did not provide further actionable content.

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=url_for+jinja+template
    • http://pizuje.frenchmanscreekshop.com/uploads/1/3/2/8/132815213/zimukamabi_nenewodorewa_wuxakirukemu_jatekamiloxip.pdf
    • http://files.toysinjesusname.org/uploads/1/3/1/1/131163851/150790.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4175/files/demande_d_aide_au_logement_formulaire.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69143450337.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/basic_spoken_english_words_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0431/6689/2181/files/46651884598.pdf
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/95554449269.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/71827493918.pdf
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/mofewofesesobune.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_off00006965.bin
a2477b412bf553caeb07242d4dc151eaceebbb1e167091c3518b189ebf10f5bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6965 4968 bytes
font_01_sfnt_off00007a4a.bin
4e7da6999bb9db51cce61d5a7c0665146ef2b9805f57300453a6e2f2c28e4f51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4A 17408 bytes

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