Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a4f683547ce43b8…

MALICIOUS

PDF

44.5 KB Created: 2020-08-01 19:03:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c5a035b071a47cc1d78b170eeb803f65 SHA-1: c3cb1b77f5d61ccd135e1d133bbf7b7df36e00db SHA-256: 8a4f683547ce43b8a89250aaaaac2d20b15c4d850cbdb3803c3df9c0357147af
194 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious infrastructure, disguised as a tool to convert radians to degrees. This is further supported by heuristics indicating a malicious redirector and a link farm. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest a lure to a malicious site, likely for phishing or malware delivery.

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.ru/pify?keyword=how+to+convert+radians+to+degrees In PDF document text
    • http://files.hoaconstruction-services.com/uploads/1/3/1/4/131438177/vimufarepasuka.pdfIn PDF document text
    • http://files.mtpskitchengarden.com.au/uploads/1/3/2/6/132695388/guwenado.pdfIn PDF document text
    • http://files.castsalmon.com/uploads/1/3/1/4/131437318/90b85d.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/1/0433/3862/9270/files/xemozajorezobu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8279/2612/files/jaxuxogidagilorunuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9464/5672/files/fegiwujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/jelubofusus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/85226612784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2466/1154/files/gevedesadimokuwelizabuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0785/1171/files/88505357072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0688/5027/files/8901852807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/luwabubosekajusanavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39843759369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9964/3286/files/zawanilajorusipos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/wovuvakuvasejo.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E0 5188 bytes
SHA-256: 9f9b2167d5a91b6585aacfa46b9e3113c24c2120d3f3ce170539d33791705591
font_01_sfnt_off000074ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74AE 15048 bytes
SHA-256: 025761b1b926ffcb41ab150e5f1ad8182b756b5853156c8ab9701e3ffa14431a

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