Malicious PDF — malware analysis report

Static analysis result for SHA-256 6acf8f19883180c0…

MALICIOUS

PDF

46.3 KB Created: 2020-08-15 23:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b42b95b613cd46a881973b6085561ec4 SHA-1: 12dcad4d08bf6bfa62d2b99c317a8d9b8e82679f SHA-256: 6acf8f19883180c0bcdc3fe44c6629f47c3d47099f36b06289750908c624cca2
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wb?keyword=classification%20of%20living%20things%20chart%20pdf', which is flagged as malicious. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect the user to a harmful site.

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.com/wb?keyword=classification%20of%20living%20things%20chart%20pdf
    • http://files.castlebrooketlc.ca/uploads/1/3/0/8/130814129/diguvojix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6074/6648/files/effectiveness_and_efficiency.pdf
    • https://cdn.shopify.com/s/files/1/0440/7833/4117/files/19845434019.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/mawoxotapumutaxij.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/allergenen_liste.pdf
    • https://cdn.shopify.com/s/files/1/0440/1351/9006/files/woxijofipawawixokopuxoze.pdf
    • https://cdn.shopify.com/s/files/1/0433/6785/8334/files/fundamentals_of_graphics_communication_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/37189000783.pdf
    • https://cdn.shopify.com/s/files/1/0437/6618/6135/files/17929613483.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_off0000788a.bin
3dcceff78c6de64c0c1ab1f24f2c46edf9a1e8fbb796df3e8807c907685e585d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x788A 5384 bytes
font_01_sfnt_off00008ad1.bin
a2df8c891fee7357dc42cd185dd96f2b16fb2b723ae1a248653c495d26c60822		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD1 9964 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.