Malicious PDF — malware analysis report

Static analysis result for SHA-256 90c565f19f8e0bb4…

MALICIOUS

PDF

43.3 KB Created: 2020-08-20 03:41:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a09bd8fc494ed878932aba8362604ce0 SHA-1: 77c546263ba23d9450b66bc040fd70ecfcb20745 SHA-256: 90c565f19f8e0bb4e6e8c238d571187ac6ad021b825cb432475400191e588aa1
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL and several Shopify URLs, suggesting a lure to external content. The ML classifier strongly indicates 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/pify?keyword=absceso+pulmonar+pdf+gpc In PDF document text
    • http://tureni.starmembership.org/uploads/1/3/0/8/130814328/4968058.pdfIn PDF document text
    • http://files.poisewithapurpose.com/uploads/1/3/2/7/132710794/zelogijipil.pdfIn PDF document text
    • http://files.baybat-edtech.com/uploads/1/3/0/7/130740264/3cfb52c8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/56207264416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/zodewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/57947880728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/17148553331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/80453318416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9144/4390/files/surface_area_of_rectangular_prism_word_problems_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7131/5869/files/rbse_class_11_biology_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/23376351842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4603/4846/files/zomegopuvegotasiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6686/5302/files/el_bosque_seco_tropical_en_colombia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9564/4573/files/duwuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4152/0805/files/vudotofiwopuminuliji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1605/2123/files/bewijuze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6091/9446/files/lojatanunixifubux.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b72.bin
b072304abd583a5cfd279ddd6b7ba7f6aa84be9ad9eb6622db06c19cfe6a279b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B72 5604 bytes
font_01_sfnt_off00007e59.bin
f4e97ed136bf4645d2b3ea963170f4fb202db8e46a63be3e3dfefe52d93bc61b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E59 9916 bytes

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