Malicious PDF — malware analysis report

Static analysis result for SHA-256 305ca7528c3f977d…

MALICIOUS

PDF

42.4 KB Created: 2020-08-12 23:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 80287fef9aa141b2f9ee3a614571788e SHA-1: af80a7933175390a03427122d1283d2fd251d3e8 SHA-256: 305ca7528c3f977ddbfd0f4b4c267a3ba8afaa380831496deb1619ebefcd85dc
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the link 'https://ttraff.com/wb?keyword=baroque%20period%20music%20worksheets' points to known malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests the document is part of a link farm, likely designed to lure users to malicious sites. No scripts were extracted, but the presence of these malicious links strongly suggests a phishing or redirection attack.

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/wb?keyword=baroque%20period%20music%20worksheets In PDF document text
    • http://files.markdifranco.ca/uploads/1/3/0/7/130739892/e92e5d382.pdfIn PDF document text
    • http://files.americalibertyforum.com/uploads/1/3/0/7/130738562/sisis.pdfIn PDF document text
    • http://files.nikkieartistry.com/uploads/1/3/0/8/130874110/jevikazevup_vuwizefutip_gagexixalufep.pdfIn PDF document text
    • http://files.writtenbybeth.com/uploads/1/3/0/7/130775484/7316160.pdfIn PDF document text
    • http://files.balancedguide.com/uploads/1/3/0/9/130969656/f07fc84210d437.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4583/8239/files/57569783887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/lutisedopagewekeli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/4133/0076/files/lupodoxewaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0651/5611/files/nulafiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/cashier_duties_and_responsibilities.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4386/4228/files/bitorixosekoteb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/my_agriculture_information_bank.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1390/6327/files/41540760813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72619586694.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_off0000598f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x598F 5388 bytes
SHA-256: cb80e3c67985a3d123f2867dc7d9c3fafba67738a149c5c38f41c557dbf325af
font_01_sfnt_off00006bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFA 10396 bytes
SHA-256: ba3c0750ae77f506afd5c8ba4f8aa659d56b7910a08880287dc146066a9d5a64
font_02_sfnt_off00008ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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