Malicious PDF — malware analysis report

Static analysis result for SHA-256 0512dedb0745bd47…

MALICIOUS

PDF

52.9 KB Created: 2020-08-04 09:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bef0f9a907d294eafb7edbd7b7511f47 SHA-1: c76d9d3b727ba702d4a29872d88d3837cf1619fc SHA-256: 0512dedb0745bd4771c21a8d75e5ca242b77e76d0d6f443226cec56f82d99ecb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of this malicious redirection chain. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is designed to lead users to harmful content.

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=guia+ilustrada+de+aves+de+colombia+pdf
    • http://kodojik.newbethelrolesville.com/uploads/1/3/1/6/131636655/kusixusotidu_zedezetinuvil_xezobunakiti.pdf
    • http://files.tfreshproductions.com/uploads/1/3/0/7/130776776/9e25413b.pdf
    • http://files.americanreferralconnection.com/uploads/1/3/1/0/131070374/vavenidajuvofam.pdf
    • http://files.argumentcritique.com/uploads/1/3/1/1/131164016/mexotawitemomukejiv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/kexuxurivejeke.pdf
    • https://cdn.shopify.com/s/files/1/0438/0937/4365/files/83985669485.pdf
    • https://cdn.shopify.com/s/files/1/0436/3993/1033/files/dadugavizakevujan.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/vutekirirajolebokowalof.pdf
    • https://cdn.shopify.com/s/files/1/0433/7768/8743/files/13739015788.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/miwaranav.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5309/files/jozujativuzumeporuxenur.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1463/files/a_small_creature_is_scrambling.pdf
    • https://cdn.shopify.com/s/files/1/0430/5872/5018/files/zatez.pdf
    • https://cdn.shopify.com/s/files/1/0433/9384/3358/files/bixadujigo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/xerozazirowoluvogiwosapad.pdf
    • https://cdn.shopify.com/s/files/1/0436/0349/3028/files/rizamilagoxezobuduxo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0527/0437/files/93001776480.pdf
    • https://cdn.shopify.com/s/files/1/0430/7143/9001/files/minobosarepanagamatubex.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_off00008add.bin
452b4f865a410aa8cc061bc64eb7a4f6cd75e15a7988f06d8162fad8686336d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADD 5532 bytes
font_01_sfnt_off00009d9c.bin
e18d0594570471cd845aef561329e46ecb452f07eb634e7e97b9bc6dbf39ad08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D9C 13148 bytes

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