Malicious PDF — malware analysis report

Static analysis result for SHA-256 54904db5c2900378…

MALICIOUS

PDF

50.5 KB Created: 2020-08-15 18:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 356a9a5319e487f88741a829485ac024 SHA-1: c4d3ed37e3f94f879a6d70808c16372ccdc0d318 SHA-256: 54904db5c290037810c0350d3db922bcbc57ff42b0e12d0c1979db5b5e405718
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to '2001 ford f150 fuse box diagram manual' and a URL that matches the malicious redirector, suggesting an SEO poisoning or phishing lure. The ML classifier strongly indicated maliciousness, and the presence of multiple external links, some to unknown domains, supports this. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.ru/wb?keyword=2001%20ford%20f150%20fuse%20box%20diagram%20manual
    • http://darojufam.sdapes.com/uploads/1/3/2/6/132681670/26245b5e69ceaf.pdf
    • http://dugaxa.extrodinarysolutions.net/uploads/1/3/2/7/132712324/renizuluwi_xefafimape_tixibuz.pdf
    • http://files.differencemakersfellowship.com/uploads/1/3/0/8/130874197/tunimimon.pdf
    • https://cdn.shopify.com/s/files/1/0439/0672/8091/files/liber_augustalis.pdf
    • https://cdn.shopify.com/s/files/1/0431/0843/4081/files/goxanile.pdf
    • https://cdn.shopify.com/s/files/1/0449/0277/6999/files/home_budget_template_uk.pdf
    • https://cdn.shopify.com/s/files/1/0431/5581/6599/files/branches_of_computer_science.pdf
    • https://cdn.shopify.com/s/files/1/0438/1625/5645/files/agmark_logo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/97722789967.pdf
    • https://cdn.shopify.com/s/files/1/0432/5552/9640/files/bibovanevudokabugifaximup.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4993/files/ruvuwavopulo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7985/1414/files/dikaxiwafejenatimupudur.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5910/files/wuvasabigazuxovo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/83279195062.pdf
    • https://cdn.shopify.com/s/files/1/0438/2746/2301/files/bluestack_app_free_for_ubuntu.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_off00007a63.bin
2c46baa1c1af0885cbb8703a9391a3b0482c3d756132cc861312af29b78f49e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A63 5788 bytes
font_01_sfnt_off00008e02.bin
0d1af1a9b894f859a788a01d450aab5085d55d14f36209edaa03f75971bc44b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E02 15136 bytes

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