Malicious PDF — malware analysis report

Static analysis result for SHA-256 25b5808c8c002169…

MALICIOUS

PDF

39.2 KB Created: 2020-08-17 01:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 312fcf5c3bfd835e08a59d09bb94be37 SHA-1: ef634f6d65df05740a4ff43c100e46b49ceb02a0 SHA-256: 25b5808c8c0021695ee71712b0a46b756b608eabd56a70a8f9f6566dae0d6fd7
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to what appears to be a link farm hosted on Shopify, with one specific URL leading to a known malicious redirector. The document body, though partially corrupted, contains text related to 'diphthongs worksheets grade 9' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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=diphthongs+worksheets+grade+9 In PDF document text
    • http://dofid.laurelwoodtroy.com/uploads/1/3/1/3/131398244/sovikukal_nuvofazib.pdfIn PDF document text
    • http://files.simpleandsubversive.com/uploads/1/3/1/4/131407315/80ee89b.pdfIn PDF document text
    • http://files.mzapatalaw.com/uploads/1/3/1/4/131437074/jugalofozovokaw.pdfIn PDF document text
    • http://files.jasminewisephd.com/uploads/1/3/0/7/130775462/4780447.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0432/0349/4043/files/industrial_applications_of_artificial_intelligence.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1415/0553/files/bibla_ne_shqip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/butterfly_valve_drawing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0925/3286/files/54744477762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6823/5675/files/besoxelifutazusimidax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/88974270771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/zowawiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4603/4843/files/29937154773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1053/8147/files/sound_energy_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7946/2040/files/zureponu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5653/6471/files/29792650285.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000509d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x509D 1696 bytes
SHA-256: c80b935bb2e72fbf0bb54bead4dcf673e2ee9ff5a06d35ab91e29c0786333a85
font_01_sfnt_off000058c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58C7 5500 bytes
SHA-256: a67a65fd4573653279d6254a56ef8736ea60079a83c9ee55ab5985d687c0ce4c
font_02_sfnt_off00006b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B83 10648 bytes
SHA-256: dc028a4cba19aaa0507ff0b71dd12cfbd88e6a50c3bfade0bd9f5c7895b8f0cb

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