Malicious PDF — malware analysis report

Static analysis result for SHA-256 7baefcea968e0584…

MALICIOUS

PDF

33.4 KB Created: 2020-09-17 05:38:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a1494d50ef7dbaaffbc3ad505d20b65a SHA-1: ab6a755c6e6eadd4618d9f007dea9f592161a2a8 SHA-256: 7baefcea968e0584067916e4fcd492cfabb7c6dca2356a562f5771d1feb29790
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable domains and are likely part of a link farm for SEO manipulation or to distribute further malicious content. One critical heuristic identified a link to known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lure users to external, potentially malicious, sites.

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.link/wix?keyword=iori+yagami+figure In PDF document text
    • http://gawun.opencoarrays.org/uploads/1/3/1/4/131453984/dukit_rexiwusonanuj.pdfIn PDF document text
    • http://junamuz.icombatbournemouth.co.uk/uploads/1/3/2/6/132681237/puwiberaxegoduveb.pdfIn PDF document text
    • http://files.strotherlab.ca/uploads/1/3/1/8/131857920/dufega.pdfIn PDF document text
    • http://files.rachellelabellesbooks.com/uploads/1/3/0/7/130775518/wasuroni.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/1/0433/6871/0294/files/waltz_of_the_flowers_piano.pdfIn PDF document text
    • https://944c8b4d-9de5-42a3-bc90-6d263c31a168.filesusr.com/ugd/10b11f_f0f07314552e4fc6a54ba6a2d2afec5a.pdf?index=trueIn PDF document text
    • https://66e652aa-de13-48b2-b3aa-feffbf99067e.filesusr.com/ugd/9b7d8a_c591e2a67e724c69b8503dd1d9dc5ea7.pdf?index=trueIn PDF document text
    • https://49e995bb-f171-49f8-93f5-c307c096856c.filesusr.com/ugd/3bcfef_d5a4afe8d0a24835801841e1299329a9.pdf?index=trueIn PDF document text
    • https://1885e8a6-1070-4eae-b607-0fb440daf634.filesusr.com/ugd/3e5db3_7faafe329d2d49f691a4760ec2ef351f.pdf?index=trueIn PDF document text
    • https://4ac7eaf0-39da-40fd-ade4-0ec66af8eb49.filesusr.com/ugd/ea2c45_8828de4ff47b49b4b648214def6e4ca6.pdf?index=trueIn PDF document text
    • https://6f3e643d-1e13-48ee-b672-e6607aca2486.filesusr.com/ugd/96564c_1faf7a18d2644f1b90865e69c06c2c1d.pdf?index=trueIn PDF document text
    • https://0ead590b-7022-4fc2-a45f-ecf63ad91c1e.filesusr.com/ugd/1c8c1e_6efa66a1939f49f4b3143e16f8278094.pdf?index=trueIn PDF document text
    • https://0b0ec471-7a4a-4c9d-87ef-d06a5ec85047.filesusr.com/ugd/c068f8_4a41aaabf22944f7b7d1964393ac9b54.pdf?index=trueIn PDF document text
    • https://70bb0005-9abc-4262-9918-2f16b7141c1e.filesusr.com/ugd/0286dd_343e04438bbd4f14ad57a3b9ff93fdfe.pdf?index=trueIn PDF document text
    • https://e2715a3e-0639-4f32-a087-f9a896f91763.filesusr.com/ugd/b148e5_ab543b01c74e4d5cb09f9c177e917c9e.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC7 4916 bytes
SHA-256: b0d80fbc5fce83bf3509bcc55153d07fc3ffaf1dc5d5b619cab7dd36d8554f3c
font_01_sfnt_off00005b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7A 8736 bytes
SHA-256: 3d3065f74fa33b2ee09b21b99312ffe1bece8633435aed619136b2d9a17a4090