Malicious PDF — malware analysis report

Static analysis result for SHA-256 75244a00fefb1fc0…

MALICIOUS

PDF

35.9 KB Created: 2020-08-26 15:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cb6a8a0bcee028d322ae8578407b26d SHA-1: ca5636ad02211b6269a0962745a5670ec9c67e3f SHA-256: 75244a00fefb1fc0c803ee2dd340cfc13fd42477ff90442f7c07aa35707e4eb1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link that is designed to lead users to potentially harmful content, masquerading as a service manual. The heuristic firings indicate a deliberate attempt to create a link farm, likely for SEO poisoning or to distribute malware. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=minister%2527+s+service+manual+pdf
    • http://saxewat.ocacolorrun.com/uploads/1/3/2/8/132814439/wivajopumu-dabikafelimore-bukufuzikami-goloxeno.pdf
    • http://tuluf.ctk.net/uploads/1/3/1/6/131606457/dokesa-fekitovuvazove-tinunotoxima-tuniwajoja.pdf
    • http://files.100alicestories.com.au/uploads/1/3/1/4/131437457/riludunifema.pdf
    • http://files.jackienorman.com/uploads/1/3/1/8/131860787/xewaguxevaxo_xarak.pdf
    • http://files.ztkarl.com/uploads/1/3/2/7/132741081/9c945.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/49474836917.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5240/files/18185024566.pdf
    • https://cdn.shopify.com/s/files/1/0440/1856/5278/files/catabolismo_de_lipidos_y_proteinas.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/buzokiduto.pdf
    • https://cdn.shopify.com/s/files/1/0436/1384/7714/files/matura_rozszerzona_angielski_sownictwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/61311592921.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/machine_learning_bachelor_thesis.pdf
    • https://cdn.shopify.com/s/files/1/0434/1058/7800/files/gabuxexorisotifovamusogol.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5304/files/rise_to_ruins_cheat_engine.pdf
    • https://cdn.shopify.com/s/files/1/0428/3095/4655/files/26992402899.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4917/files/lejidasesilexegedunusalil.pdf
    • https://cdn.shopify.com/s/files/1/0434/8706/8322/files/akshay_kumar_baby_movie.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d9d.bin
a1067ce64e5c7bd17df96d53a9f3fae8cc6f0d61e0761f1ce19cb9b46921270e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D9D 5400 bytes
font_01_sfnt_off00005ff4.bin
a24e555ee03c9dae9f2844d8f94e199ac462076670b25cd7e6effaf529d797aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF4 10176 bytes

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