Malicious PDF — malware analysis report

Static analysis result for SHA-256 83947f5fad66638c…

MALICIOUS

PDF

40.6 KB Created: 2020-10-16 09:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3d862b9b2b5d090b470941c7c3902864 SHA-1: 57f1ec1e1580bbfcfbfd528a3e98d5bce12f171f SHA-256: 83947f5fad66638cd44d09b1757d3e315224d08b065cc404226f1dfd0b732d32
184 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one pointing to a known malicious redirector. The document body, though obfuscated, contains text related to 'Makita circular saw guide rail' and embedded URLs, suggesting a lure to a scam or phishing site. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector URL confirms this.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/pify?keyword=makita+circular+saw+guide+rail In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f883d36d61f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366662/normal_5f874acac9ac5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f87ddd848ef1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f88d32dba413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5f89091e17977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369900/normal_5f88f1430317a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_5f88759671c3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367921/normal_5f88a22568d44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f89219f96db4.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/dozafawegikuxoto.pdfIn PDF document text
    • https://fevixivosetakub.weebly.com/uploads/1/3/2/6/132681861/b706df315f65.pdfIn PDF document text
    • https://fanavepuru.weebly.com/uploads/1/3/1/8/131871984/c3f365af.pdfIn PDF document text
    • https://mikazeral.weebly.com/uploads/1/3/2/3/132303371/5050020.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/kamiv.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/jikijak.pdfIn PDF document text
    • https://pagofere.weebly.com/uploads/1/3/1/3/131398194/eae86f5a384c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5f882f0483acd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f87cab5a0b14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f876d56d7fe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f877fcbe944a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c4251b9-33c5-42bf-90f2-31714c68f1fd/8966600800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6961363-bbc6-4250-90f3-b7db69412b9c/fudisolof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/899c00fb-9770-453d-8b00-db2347ebe238/wanewipokesiburaraxiwabit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2155d5d3-7250-4e87-a85c-9645250c23c0/45067110341.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_off00005e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5B 5268 bytes
SHA-256: 003fccf309830b3b975b1d75599f8019b8a46908a12128bf61ca9f2d2017358f
font_01_sfnt_off00007063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7063 10560 bytes
SHA-256: 87331476b48522bc99cb04e96b8b00e52d08102e5841f18e1f39d33773064e22