Malicious PDF — malware analysis report

Static analysis result for SHA-256 37fdba96647659c3…

MALICIOUS

PDF

44.4 KB Created: 2020-07-31 02:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b5044dfc02489adaa1de243248538fc7 SHA-1: fe9b30d23a2770187cb7e3c5f85cc082599c179c SHA-256: 37fdba96647659c3b6a3854d411c777cacea0805d24248d6b587bf1a20a1904d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, identified as a link farm. One critical heuristic indicates a link to a known malicious redirector infrastructure. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, and the document body was heavily obfuscated, preventing a deeper analysis of its specific content beyond the presence of links.

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=biomagnetismo+isaac+goiz+pdf In PDF document text
    • http://files.atlantaillinois.org/uploads/1/3/1/1/131163578/9873081.pdfIn PDF document text
    • http://files.fitstudiolancaster.com/uploads/1/3/1/3/131379939/020a064.pdfIn PDF document text
    • http://files.upcowildandscenic.com/uploads/1/3/0/8/130814205/154db9818a.pdfIn PDF document text
    • http://files.twohugos.com/uploads/1/3/0/7/130738993/3e447d2c1b5e91.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/1/0431/9048/5150/files/zakufasabogovalelisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6777/5905/files/xuvegozas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7194/7423/files/kifuduzowimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0819/5738/files/texuroxeguxibefim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32867625585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/witekivimosokejeximetubix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/12758375678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0465/6797/files/regile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/79157895469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/pimarewinalodupomoxetodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2576/6312/files/fobelizaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5959/2859/files/74000698316.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 8

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_off0000701c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x701C 5232 bytes
SHA-256: 88eb23f62841c60dea8fe192cb405038f32f859be2295ccdb17e7d34b9dcf473
font_01_sfnt_off000081d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D9 10328 bytes
SHA-256: d2c60eec3618e61b2c251659776fc1fcf36c6586400d7c7885fe32f2a46cbb99

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