Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c062af4fda443fd…

MALICIOUS

PDF

33.7 KB Created: 2020-10-05 10:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 43d92ac23eab2e0aa5c898afa5c6b6ec SHA-1: dd79ded8460065840de849fd1cb0f4c77831bf4c SHA-256: 6c062af4fda443fd1f96192ab23417b46de068f0a7db8b7ae2b0bebce870fed3
154 Risk Score

Malware Insights

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

The PDF document contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure for a worksheet, suggesting a phishing or social engineering attempt. The presence of multiple external links, many pointing to PDF files on content hosting services, indicates a link farm or redirection strategy to obscure the ultimate malicious destination.

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://ggtraff.ru/strik?keyword=the+bottled+ecosystem+worksheet+1+answers In PDF document text
    • http://juven.ballicotech.com/uploads/1/3/1/3/131379246/e0132e.pdfIn PDF document text
    • http://bovex.madisontoth.com/uploads/1/3/1/4/131406121/7819797.pdfIn PDF document text
    • http://fikosipos.anne-dance.com/uploads/1/3/1/3/131379844/fopozobakevuli.pdfIn PDF document text
    • http://files.flancmanfrisch.com/uploads/1/3/0/7/130739856/3294372.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8831/3506/files/weber_smokey_mountain_smoker_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1338/5635/files/design_for_electrical_and_computer_engineers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3527/0039/files/wards_sewing_machine_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e3fecf6-8f89-4318-a04c-2d258b347765/32028025495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3419fdb2-8001-4648-9a89-8623803cb230/95172348216.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4512 5576 bytes
SHA-256: dde26a03c9d57de117195555431cb309f62776fc552da0d6fa8571bff06812ee
font_01_sfnt_off000057f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57F3 10176 bytes
SHA-256: 99808d59db4c7ddb3b250d476fd9b9a7a14a3943f802bc40057f3244f4c2809e