Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c1bc32a61ea473e…

MALICIOUS

PDF

44.5 KB Created: 2020-09-11 15:12:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8633a5e108f0a23fef83833487be668d SHA-1: 46f5044d28e26684d36241270eead77e4476f4a7 SHA-256: 8c1bc32a61ea473e53ed441816ead21d65c3f80f7a0f9d3239c1749d3eeb56f7
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains a critical heuristic indicating it links to a known malicious redirector. Additionally, it features a link farm pointing to external PDFs, suggesting an attempt to manipulate search engine results or distribute further malicious content. The presence of a visual download button lure reinforces the deceptive nature of the document, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=printable+certificates+of+achievement+templates In PDF document text
    • http://files.mercedoptometry.com/uploads/1/3/2/7/132710784/rusuliwewu-mitopelabolab-gibepe.pdfIn PDF document text
    • http://nunebiru.ralphgibson.com/uploads/1/3/2/6/132681670/kitutukoxetow.pdfIn PDF document text
    • http://files.kabani.eu/uploads/1/3/1/3/131398125/3276247.pdfIn PDF document text
    • http://lavopa.ranchosanmanuel.com/uploads/1/3/1/1/131164250/wemokijewir.pdfIn PDF document text
    • http://sudalu.artisanwineandcheesecellars.com/uploads/1/3/1/3/131384635/miwepenib.pdfIn PDF document text
    • http://bidulor.pepeandnixi.com/uploads/1/3/1/8/131872048/4796635.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_cfed0368144b4d54898b2bde364a1518.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/48f461_5385178a6323465ba2d822c4b401bd48.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_8a1051f93a97403fbf82fefb01b3a263.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b27199_812f9a37c45d46c59cff0c14f763494a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4bb894_e3cc85a775f448b7a72db3b2eba2dd29.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5f226e_6219186ffdaf4fb6892912ba6d48f61d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d99ef3_073c3447fb974199a20dbd7db79ca4c1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/625844_bb5cdbfaae254b1f94513691f9382227.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_aed35aa1fc134d989308ae735df3f3d2.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
stream_004_off00006fae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6FAE 5456 bytes
SHA-256: 7feaa25b9406cead9d90d3cd00d7c32879056b153d5d51f6d06a844e64090739
font_01_sfnt_off0000821d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x821D 10060 bytes
SHA-256: ddb84fd6b03b9f2b87be19fe7e3b2f1d198759131893488a64d4d8be37492895

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