Malicious PDF — malware analysis report

Static analysis result for SHA-256 f78377a9209d70d9…

MALICIOUS

PDF

35.1 KB Created: 2020-08-22 00:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e6e8d4078acaa11e97c6e4b841368426 SHA-1: 36316062592a09088e088a56d53a93c3f88ebaad SHA-256: f78377a9209d70d9a741cd3a503661465e241edbbd236cdb8913872a79648019
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains a URL that points to a redirector, which is likely intended to lead the user to malicious content or a phishing page. The presence of numerous external links, many pointing to Shopify-hosted PDFs, suggests a tactic to manipulate search engine results or distribute further malicious content.

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=cc+algebra+1+chapter+2+answers In PDF document text
    • http://files.localdmvhomes.com/uploads/1/3/0/8/130814232/6354617.pdfIn PDF document text
    • http://xozivuseb.coppercanyoncinches.com/uploads/1/3/0/8/130873949/8502391.pdfIn PDF document text
    • http://fifegom.oakgrovechristianschool.com/uploads/1/3/1/0/131070847/rokajuzofixemorarub.pdfIn PDF document text
    • http://sufaxofiw.thecountup.com/uploads/1/3/1/8/131856877/b8eaaf91f.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/1/0432/5172/8546/files/difference_between_epidemic_and_endemic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3375/4785/files/bonovijosumoruleroda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4230/3140/files/centrelink_medical_certificate_su415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6163/9318/files/69725804544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8049/8852/files/how_to_build_self_confidence_at_work.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/datufezon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9090/2166/files/3ds_max_tutorials_ebook_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zukax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/ark_daytime_command.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/1169/7814/files/janejesibidikev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3859/7539/files/denatesulevudexijatudike.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 5

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_off00004856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4856 5516 bytes
SHA-256: 4661b834f5e03fcf21ec2285b0deec847e0ad959bd6e78ddb525802380e12d1e
font_01_sfnt_off00005b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1D 10296 bytes
SHA-256: e6a7e68c14de616c84ceac6e92b39206b0bcc2d69afb082f31679159fa78cd42

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