Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa76591e9090c827…

MALICIOUS

PDF

35.5 KB Created: 2020-09-12 03:33:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 65584e88d1249363c1de7506681b6d92 SHA-1: 6109e8eb15d52e5b73c536a424d579f3800e7b40 SHA-256: fa76591e9090c8273dbc0b2052bb7298e7c810a3c21118f0fe29265c2049665d
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded external links, a technique often used for SEO manipulation or to distribute further malicious content. One critical heuristic flagged a link to a known malicious redirector. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it's not a legitimate document. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.link/wix?keyword=hanukkah+songs+sheet+music In PDF document text
    • http://gufek.acacampeagle.org/uploads/1/3/1/3/131379532/f44052a61240c7.pdfIn PDF document text
    • http://files.findingjoyinsurrender.com/uploads/1/3/2/7/132740293/2907542.pdfIn PDF document text
    • http://files.sophielebrecht.com/uploads/1/3/0/9/130969115/zuduzotedid.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/1/0429/8558/6849/files/new_status_app_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/8407/9264/files/bidegidubovax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2541/6860/files/55968400423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4362/4872/files/the_guild_2_renaissance_beginners_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuxojusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0470/6477/6872/files/jizokezilus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1433/2309/files/buserigepimufunifazu.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9ff9b8_0c5251b21dec4a68bc77cd91e6502c0a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3e5d97_05be8b2b9ed24fb6b9051d5c5d27beb6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_4bf3d8c6071a45e3a927d926aac3c04e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/76156b_e83598aeed4440f7984897fd3f1a1569.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 2

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_off00004db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DB7 5108 bytes
SHA-256: f33c78b03f645155b849d40d5a0a605e5ceeef1d331a86aa5fc7789f52ab0baa
font_01_sfnt_off00005ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF9 10136 bytes
SHA-256: d079fc9a0bff82b3b661bbe6a2d3a812f82cbf51db89ea45f85a46a76eaa8d8c

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