Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ec078525810930…

MALICIOUS

PDF

60.8 KB Created: 2020-09-29 21:40:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e33de52352eaf3d02e77c4561da79e11 SHA-1: e985cc51957e41e5c21ecaf56e4bbb46f916dbd0 SHA-256: 17ec078525810930fb8daf5cca2783ab8cdb49fff93090c512effbf9d90005c4
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting, and one critical link to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector, suggesting the PDF's primary purpose is to drive traffic to malicious infrastructure, likely for SEO poisoning or phishing.

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://ggtraff.ru/strik?keyword=bolt+clamping+force+calculation+pdf In PDF document text
    • https://site-1037241.mozfiles.com/files/1037241/fagavukadekositerava.pdfIn PDF document text
    • https://site-1037094.mozfiles.com/files/1037094/53717767591.pdfIn PDF document text
    • https://site-1036924.mozfiles.com/files/1036924/tuxikomapuzatibemula.pdfIn PDF document text
    • https://site-1036711.mozfiles.com/files/1036711/17389288655.pdfIn PDF document text
    • http://putanateg.glassplaqueawards.com/uploads/1/3/1/4/131454143/429f7.pdfIn PDF document text
    • http://rofek.dski-one.com/uploads/1/3/1/0/131070152/jevusi.pdfIn PDF document text
    • http://belajeze.caringinc.net/uploads/1/3/1/3/131398252/xefujipisogupun_kasabiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/91b9dd73-87af-4cd6-bcfe-2abbc384928f/87369571171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/242b18a7-ffe4-4bbc-a96f-35a892626031/43174544921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03e4bd32-01fc-4b42-93c2-b897476780a7/xaboxedosarofofusava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c80e4402-9219-4fe8-8766-f32624496f2c/xuzujos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af82a3cc-6229-423b-8053-0f710f09017e/rovitalunivuxakuxajuxevus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3f0ab66-78f1-4765-b07e-6d1da3fd53f8/foziropiloxalanovuwirinaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91a0033c-4eb2-404f-82af-15df9ad49bfa/vagitavizodetuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f981b4f2-e74b-42de-b4d9-a811ac5fffd4/wurulumefidijeruw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA165 5228 bytes
SHA-256: ae9ab6f4f4cc606521af80841cd6595666bc428b83038238b676bce7f05fcbfe
font_01_sfnt_off0000b311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB311 11068 bytes
SHA-256: f00144c744d6a483234babe66f5bb5450e526740307a6fdcbea74a7739886bc5
font_02_sfnt_off0000d78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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