Malicious PDF — malware analysis report

Static analysis result for SHA-256 239df3661ef607a4…

MALICIOUS

PDF

33.4 KB Created: 2020-08-26 03:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96efc26b6af52e87a18d7d6613ba0195 SHA-1: 77e02f119d17ac2844ab9b9e3b65481c7127af42 SHA-256: 239df3661ef607a4c9adc70383cd11cc90b70eef4c223ee19ab8bfd7ef89dfc5
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure related to a TV show, likely intended to trick users into clicking the malicious link. The file also exhibits characteristics of a link farm, embedding numerous external PDF links, with the primary malicious link being to 'ttraff.com'.

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=corazon+indomable+capitulo+119+parte
    • http://fapetof.laboroflovesingapore.com/uploads/1/3/2/8/132814930/016e6acd4159.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/bingo_video_maker_apkpure.pdf
    • https://cdn.shopify.com/s/files/1/0432/2725/0848/files/fuzagutorozodoredesuxinig.pdf
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/26808962471.pdf
    • https://cdn.shopify.com/s/files/1/0429/2198/4166/files/loledakefij.pdf
    • https://cdn.shopify.com/s/files/1/0439/2130/9851/files/cellular_respiration_steps.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7616/files/49480096173.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/77199127920.pdf
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/baxepimatofozinuxadatal.pdf
    • https://cdn.shopify.com/s/files/1/0430/8477/5577/files/40968390231.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/66628629956.pdf
    • https://cdn.shopify.com/s/files/1/0431/6531/9324/files/kozegobisolepejudisi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5895/files/lubenuzukuxorugine.pdf
    • https://cdn.shopify.com/s/files/1/0466/4210/2437/files/pozuvezatugimikefilonon.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_off00004467.bin
4462afb89c591a841a0280f137ec8efce1436e5aac9f5b49d222dccb2ce52faa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4467 5344 bytes
font_01_sfnt_off0000567c.bin
b3849bc3c359fbfca1a48b3c7f61018433137b055a820eee656f66af7bae50c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x567C 9612 bytes

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