Malicious PDF — malware analysis report

Static analysis result for SHA-256 e91ee733ee3aced9…

MALICIOUS

PDF

41.0 KB Created: 2020-08-16 23:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c07f799935613b0b1b5f91db3542dd78 SHA-1: 5fefa994713ebe342e3beb8c5807f2267b5b1cc5 SHA-256: e91ee733ee3aced999d23857413e90fc40ca2eb24f3fafeb3fcccbfe164a9d4b
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a data sheet. The document also contains a large number of external PDF links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to distribute malicious content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector and the link farm suggests a phishing or malware distribution attempt.

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/pify?keyword=gripper+primer+data+sheet
    • http://files.rockfordroadrunners.org/uploads/1/3/0/8/130814112/xezulodetomovif.pdf
    • http://files.abodobusinesssolutions.com/uploads/1/3/0/9/130969681/gezopobobujija.pdf
    • http://files.thehaesslyagency.com/uploads/1/3/2/7/132740723/075029a48e65.pdf
    • https://cdn.shopify.com/s/files/1/0438/6645/6224/files/48544227023.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/38153569363.pdf
    • https://cdn.shopify.com/s/files/1/0431/7210/2308/files/98030448622.pdf
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/warriors_of_chaos_army_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/6772/7269/files/annex_13_chicago_convention.pdf
    • https://cdn.shopify.com/s/files/1/0433/5452/1758/files/kedofuz.pdf
    • https://cdn.shopify.com/s/files/1/0440/3937/2965/files/36270114013.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0787/files/21594174461.pdf
    • https://cdn.shopify.com/s/files/1/0432/1778/0896/files/jefifusilinevar.pdf
    • https://cdn.shopify.com/s/files/1/0438/4922/0256/files/eat_stop_eat_by_brad_pilon.pdf
    • https://cdn.shopify.com/s/files/1/0434/0636/0730/files/gepuwabiguv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000538a.bin
9ded8c410e1e328d47b7e887956db27ac021f73253714758265f18ed28cff4bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x538A 4768 bytes
font_01_sfnt_off000063ba.bin
93012dd01d80bf03ba231d5e6eb08ac2e8ab11757274a5965ff832b2c8e71b1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63BA 10464 bytes
font_02_sfnt_off00008785.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8785 4324 bytes

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