Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b5f1dfc4e290e04…

MALICIOUS

PDF

44.8 KB Created: 2020-08-11 18:29:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 634330ef3294985dcaf94da0cab7eba1 SHA-1: 4bcf975c03f4940fb9dd78bf9ba2932000152b18 SHA-256: 3b5f1dfc4e290e04909a0938a3764fbea0d536ebf48a525d5befd0f77cfe5f91
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, masquerading as an audition form, with one prominent link redirecting to known malicious infrastructure. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms this malicious redirection. The PDF_SEO_LINK_FARM heuristic indicates a large number of links, likely for SEO manipulation or to host further malicious content. No scripts were extracted from this sample.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.com/wb?keyword=roadies%20x4%20audition%20form%20pdf In PDF document text
    • http://files.centennialtimberframes.com/uploads/1/3/1/6/131636916/jalomobem.pdfIn PDF document text
    • http://files.restormin.org/uploads/1/3/1/0/131070173/wupekatipeto_gedenekute.pdfIn PDF document text
    • http://files.kenyonbuilding.com/uploads/1/3/0/7/130739225/salimoresapu_fovidako_daguzidowev.pdfIn PDF document text
    • http://bikulotij.toptierdanceacademy.com/uploads/1/3/0/7/130739860/jilagerisuzil.pdfIn PDF document text
    • http://files.spiralofcooperation.com/uploads/1/3/1/4/131407357/39595.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/1/0434/5046/6464/files/dirasewozofukokenologe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/senebunulexorolowolub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3956/1630/files/history_of_azo_dyes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7102/0964/files/quran_download_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/tagotapotejubojerof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8018/8058/files/hilti_dsh_900_parts_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4379/9719/files/lokezina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9657/8979/files/72890851161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20785775646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5930/5877/files/biwaritidej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8879/8111/files/jutafarojuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9541/5189/files/vujidade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8489/7701/files/88179059451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2036/9567/files/gatazalil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6410/6909/files/nozegosozavomotiso.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_off000061ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AE 5316 bytes
SHA-256: eff8a7501fcca71d258e1d93f094d4b72f06abc6bc21ef3813330a413e842b8f
font_01_sfnt_off000073b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73B2 5012 bytes
SHA-256: d6a78c63255ab441b49e033f1529ea58957c56e1c61d3d975305952a58a14353
font_02_sfnt_off0000815b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x815B 10572 bytes
SHA-256: 287af44e23710283cee4eba46905bb92b55209e9e48b33f5e48083858b898ac2