Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2b207fd2a7cb05…

MALICIOUS

PDF

34.0 KB Created: 2020-08-19 19:09:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 776be4acf0579e6aea5582ce9666d36f SHA-1: b3264b3c2619adcf3a8bde9fbcc3c17d3b61c1a9 SHA-256: 5b2b207fd2a7cb0583981bf01b7d2bd8d5e83fa5bfb0cf70a1df1ed1bc88a7d5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to appear as legitimate downloads but redirect to malicious infrastructure, specifically identified as a redirector. The ML classifier strongly indicated maliciousness, and the presence of numerous SEO-optimized links further supports a phishing or scamming attempt. The document body itself is heavily obfuscated and contains the primary malicious URL.

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=music+birds+chirping In PDF document text
    • http://files.dangerous.studio/uploads/1/3/0/8/130813516/daginegunesizeloje.pdfIn PDF document text
    • http://files.thehuicholcenter.org/uploads/1/3/1/3/131380292/mikososofugo.pdfIn PDF document text
    • http://files.velohangar.com/uploads/1/3/1/8/131871633/dikelajukatan_migije_rokoxonob_jawotadenatise.pdfIn PDF document text
    • http://jasogivuz.worthingexcelsior.co.uk/uploads/1/3/0/7/130776326/gokaxubutitisepusuli.pdfIn PDF document text
    • http://files.runtuffborzoi.com/uploads/1/3/2/6/132695734/wirosobanawoxisi.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/1/0432/0133/1360/files/digital_branding_strategy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/belmont_report_educational_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8232/3870/files/16196206421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9128/7450/files/robinair_34288_problems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0517/3147/files/75713816294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8923/9969/files/bajaj_boxer_150_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mubexuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5356/2526/files/qualified_audit_report_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9000/1572/files/piwuvugaxiterizexuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5323/6902/files/56549414946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/89090047913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4394/5628/files/lunajolanelu.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_off000048c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48C3 5240 bytes
SHA-256: 6ace583b1d7b3e9bf6fe2a22b7b3423994b2c536c7312bd84bbeb6d11d606c71
font_01_sfnt_off00005a86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A86 9588 bytes
SHA-256: 8d1120261efa3785ed1ceba53b8464fa6feec11793e792ec2b5c227263ab6a33

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