Malicious PDF — malware analysis report

Static analysis result for SHA-256 635d537a9baa4a64…

MALICIOUS

PDF

44.5 KB Created: 2020-08-13 21:34:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 790c3ce7bdab70456acbc982029583b2 SHA-1: 44f60acb1b98329f11472bbbd0bfd39b7697f987 SHA-256: 635d537a9baa4a64e1111aa83575113d1b899e75d94373198242f7297d1fb239
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector infrastructure associated with malicious activity. The document body and embedded links suggest a lure for users to download further content, likely malicious. The presence of multiple external PDF links indicates a link farm strategy to distribute malicious content.

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/pify?keyword=abs+workout+program+pdf In PDF document text
    • http://files.hooksflyinghranch.com/uploads/1/3/1/4/131437627/dibariv.pdfIn PDF document text
    • http://files.ourlordstemple.org/uploads/1/3/1/6/131606416/guxobov.pdfIn PDF document text
    • http://files.libertyrecbc.com/uploads/1/3/1/1/131163512/3865817.pdfIn PDF document text
    • http://mabuvugov.tayloredtoyouevents.com/uploads/1/3/0/9/130969153/bapigetulipupet-rugukivov-fawafojidal-renanojemutora.pdfIn PDF document text
    • http://files.coastlinepainting-nc.com/uploads/1/3/1/4/131438557/3600059.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/1/0441/0182/8760/files/litenipomezabepadoboleli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8448/9631/files/27825095943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/working_principle_of_digital_oscilloscope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6337/7048/files/olympian_generator_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4048/9122/files/76754545528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24863128440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/85546567720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3846/5435/files/factorio_3_lane_balancer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66048758492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6100/9818/files/bm_sharma_pdf_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0763/0747/files/82363911333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5542/3398/files/sirup_belimbing_wuluh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1629/6360/files/principles_of_economics_asarta_butters.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 5

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_off00006c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C66 5612 bytes
SHA-256: 4ecef171d755dd8a8eb75ebfc333eb8c6c2e7513e3672cce5589f305053d14a1
font_01_sfnt_off00007f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7C 10672 bytes
SHA-256: 1d9a6587697d5cd17494223c8b3dd777d868fc0566004e320947e13563895f1a

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