Malicious PDF — malware analysis report

Static analysis result for SHA-256 785ef3be36714de2…

MALICIOUS

PDF

39.3 KB Created: 2020-09-01 20:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ad87d521d43383a6d26cfd3a8124d2f9 SHA-1: 59ffa701d95a6884fcdb3ceeedf291495f4c9029 SHA-256: 785ef3be36714de2ad32219de1508ad1bf9aecfe10754cfca0ef46ec5e6262a2
194 Risk Score

Malware Insights

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

The PDF contains a lure for a 'potluck sign up sheet' which, upon clicking, redirects to a malicious URL. This is further supported by heuristics indicating the PDF links to known malicious redirector infrastructure and is part of a link farm. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URLs and heuristics point to 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.link/wix?keyword=potluck+sign+up+sheet+facebook In 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/7598fa_9f640eebba1d4b0baef768d89860ae79.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0d002d_3a6d64a3cdbb4e5d98ef06b6a1f2405e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_071dbba00ab84b9e86744c2f01ade6c0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3438/5303/files/cerere_inmatriculare_auto_2020_brasov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/bodexapaxazaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9088/6299/files/84339796602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6479/2990/files/candy_selfie_camera_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1342/2753/files/o_level_maths_transformation_notes.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1be480_bbfcdeb1758f491da92140019cd37aed.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/111c46_f26b0bc2f7954daca1d71ca9e5033aee.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/34e21e_b7e3f01aa9624489843d099092dedc51.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_bc5f17f1c9a64ac3bf44c0439541038a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/aec2ea_ef6132c7d523475796f94d3ff9a79ee6.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_off000051e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51E1 5388 bytes
SHA-256: 3d07e1311a1eea3998829b07c01dfe8f0a52520dfefb515ce5c22732e476dd8b
font_01_sfnt_off00006437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6437 2044 bytes
SHA-256: e8def34ef7fa1cd1e737aa53281a1ad4be732a20e453453846aa670fb207f4af
font_02_sfnt_off00006da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA4 10060 bytes
SHA-256: 37b8a7c48195ae4ea787867dc494f588f14daa6cb68157f166f9d95c679ee9f0

Open this report in the interactive analyzer, or submit your own file for analysis.