Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e9ad391ebc3f1a9…

MALICIOUS

PDF

47.8 KB Created: 2020-08-21 01:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99f8e61b6646bce466f364e15e603419 SHA-1: 02564735ee2dc19465b0e1fca3a86e3020a4848b SHA-256: 5e9ad391ebc3f1a9e39c77323e9b2509edf090e37f0e4547365ec85048e7f955
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically the URL https://ttraff.ru/pify. This technique is often used to obscure the final malicious destination and evade detection. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded links points to a spam or phishing campaign.

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/pify?keyword=american+pie+all+parts++allofpc.+in
    • http://files.katrinahollowayphotography.co.uk/uploads/1/3/1/3/131398184/024673.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0445/9918/1476/files/critical_reasoning_aptitude_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/sql_server_2020_management_studio_installation_steps.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/4207399707.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/65889714017.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6343/files/53049359311.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7255/files/rational_and_irrational_numbers_worksheet_grade_9.pdf
    • https://cdn.shopify.com/s/files/1/0438/2857/6416/files/xiferokuxas.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/saduwilufuvu.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_off00007b42.bin
8738a5fa0a7aecc92291133d3eb0289d3e8f5ea5c08f6cbe77f6d22e2b5bb350		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B42 5180 bytes
font_01_sfnt_off00008cbe.bin
c4b0af4b1a33dfde77172cbb936346b0691505ae2b0330222ed6c2ad84e97fd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBE 11128 bytes

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