Malicious PDF — malware analysis report

Static analysis result for SHA-256 163ef36cc2473985…

MALICIOUS

PDF

64.9 KB Created: 2020-11-23 21:47:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 745d30407537516128877421e85e5415 SHA-1: 1e3d2e7a5e358514bed1d013c0cbb0a2cf51ab44 SHA-256: 163ef36cc2473985f48c11f47cd0ba4948921f9306404efb8bab2e7ba68e82c0
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to redirector infrastructure, indicating a link farm or phishing attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags the URL 'https://gettraff.ru/strik?utm_term=sign+language+worksheets+pdf' as malicious. While no scripts were extracted, the document's structure and embedded links strongly suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/strik?utm_term=sign+language+worksheets+pdf
    • https://jozimowisefi.weebly.com/uploads/1/3/4/3/134331090/kaxiwevir-wakizilifilexem-bobusapepibizeb-ferujuxikosabi.pdf
    • https://delularisif.weebly.com/uploads/1/3/4/4/134482541/vedupupov.pdf
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/6415556.pdf
    • https://cdn-cms.f-static.net/uploads/4483335/normal_5fb44c09857b1.pdf
    • https://wejibuxod.weebly.com/uploads/1/3/0/7/130740202/wusepokolukekoteneza.pdf
    • https://zenisitidijo.weebly.com/uploads/1/3/4/3/134309999/8231613.pdf
    • https://lipijunozawisek.weebly.com/uploads/1/3/4/7/134721324/9176355.pdf
    • https://towosafanux.weebly.com/uploads/1/3/4/7/134704793/b1278.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/muxozuvalubi/31116805563.pdf
    • https://uploads.strikinglycdn.com/files/fa1242b2-1a78-4ac5-8f25-5640833f6669/xutaraw.pdf
    • https://uploads.strikinglycdn.com/files/f7a21173-f34d-4d60-9815-e06e1a67b869/fukajigejax.pdf
    • https://s3.amazonaws.com/tetofamuxulil/lerusojuzibuzenij.pdf
    • https://uploads.strikinglycdn.com/files/58638906-a678-490b-8cda-bbf88c99ba3d/short_by_holly_goldberg_sloan.pdf
    • https://uploads.strikinglycdn.com/files/38b5c224-4926-42cf-be28-4232f9ae97cb/rixoraloxoz.pdf
    • https://s3.amazonaws.com/subud/654184924.pdf
    • https://uploads.strikinglycdn.com/files/2afa077d-21ac-4d39-a889-53e710b4d3cd/daxefipikanagawu.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_off0000c105.bin
5b2426f95e49b168c97f63b4232e820b12f272e742436ca7c501a0893031a58a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC105 5560 bytes
font_01_sfnt_off0000d3fd.bin
2307a3bdb6ac106fc50c779646b68df827e316622ed29eebcb67980d2ac156e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FD 10276 bytes

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