Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca98a5bea4e30b3d…

MALICIOUS

PDF

42.3 KB Created: 2020-08-11 21:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc74184c715f899be50f1c7941bce696 SHA-1: 395cedc50799f3e8358b0bcf8db81d944e99e402 SHA-256: ca98a5bea4e30b3d14844f92c33bf3102628f9180b3d26e82ce8abc574cb576c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a keto diet resource, aiming to lead users to harmful content. The PDF also features a large number of external links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic to obscure the malicious redirector. The ML classifier strongly indicated maliciousness.

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.com/wb?keyword=keto%20diet%20josh%20axe%20pdf
    • http://falez.whatwouldateacherdo.com/uploads/1/3/0/8/130813528/vonigugupagux.pdf
    • http://files.tynksgemstonedesigns.com/uploads/1/3/2/7/132740415/7381d2f1749d4.pdf
    • http://files.revebureau.com/uploads/1/3/2/7/132710783/2379133.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7282/files/noble_skyrim_sse.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/elementary_number_theory_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/9024/7829/files/126020174.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lomapatigusobotatijizu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/kazulavegevuzile.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6681/files/lopafamevolifedobexekugaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/4294/7750/files/faselukedep.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/yamaha_48_volt_charger_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/5417/7185/files/32813135668.pdf
    • https://cdn.shopify.com/s/files/1/0433/6962/7799/files/gojozanizofifan.pdf
    • https://cdn.shopify.com/s/files/1/0440/4989/1478/files/71141139242.pdf
    • https://cdn.shopify.com/s/files/1/0440/5451/1766/files/kavakipepufepawimaveboke.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/84173789528.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_off000066f0.bin
ce9bea0ae75a9e3ae794adac0a5d426586696d4d0a9bb776f6cd2e273f84c525		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F0 5116 bytes
font_01_sfnt_off00007869.bin
32f38f22e4ec359bd0aa8e0d74574b5321ca454e153185bf7cd25563f3ba497b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7869 10512 bytes

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