Malicious PDF — malware analysis report

Static analysis result for SHA-256 39bf9b8ac7771361…

MALICIOUS

PDF

51.4 KB Created: 2020-09-09 15:37:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf0bb28e2b83d11dbbdfd96ab0ac92c7 SHA-1: 01208c884d6261a3ef41188044f1b32cb07db77d SHA-256: 39bf9b8ac77713610aa2228662fc24fd379e230f1bf9f96e24a74185226064ac
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one disguised as a corporate brochure design template, which redirects to malicious infrastructure. The ML classifier strongly indicates maliciousness, and the presence of a link farm on disposable hosting further supports a malicious intent, likely to distribute further malware or phishing 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/wix?keyword=corporate+brochure+cover+design+templates In PDF document text
    • http://files.rangerssupply.com/uploads/1/3/0/9/130969075/zozurituvu.pdfIn PDF document text
    • http://files.hopefulbyhope.ca/uploads/1/3/1/4/131408100/zagazajavemepijotot.pdfIn PDF document text
    • http://files.devinadouglaslaw.com/uploads/1/3/0/7/130776489/wakupuzoxifumomumox.pdfIn PDF document text
    • http://nepelori.talltaledesigns.com/uploads/1/3/1/3/131398455/dabam.pdfIn PDF document text
    • http://files.walkercenturyfarms.com/uploads/1/3/1/0/131070151/xuvutun.pdfIn PDF document text
    • http://files.stonycreekenglishshepherds.net/uploads/1/3/0/8/130874524/4d6f2c6e6cae5.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/1/0433/8450/4474/files/gevadilekavamobavakubisew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7510/9013/files/neselunolefatanofumuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9685/1111/files/valley_apparitions_memo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3152/7577/files/solar_air_conditioning_and_refrigeration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/29747794250.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4c3ae3_6700e85d518d45a3850213c15c40e01d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b96e41_a1742ee5cef1433aaee75390b538f6f4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/086daf_ab4a4d9c4c0d4fc19b9de0db3a561fc3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8a9bcc_d5558aaebb164e699d77042b18cfcf66.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/37428b_acf7878df926488d90bfbf358d2e0779.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_off00008947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8947 5592 bytes
SHA-256: 5a8e5912d4db214c38a066abd77c91f74330d9964579f4dda0c09f31a73d179f
font_01_sfnt_off00009c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C17 10544 bytes
SHA-256: 4561cf3bfc1a1ac442be9c86f65f9440142d87753903320605cbdc13ff5b8b48

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