Malicious PDF — malware analysis report

Static analysis result for SHA-256 686712a2debcd6af…

MALICIOUS

PDF

65.5 KB Created: 2020-09-30 04:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 781a815cb2be1e36ba5f5caf472b014f SHA-1: 82d269526286737631c423762dc88f873b9098e6 SHA-256: 686712a2debcd6afa0065ea309d7a865ae15d98a3d881e512b84381bd7347cb5
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file is identified as malicious due to its function as a link farm, containing numerous embedded URLs pointing to potentially malicious redirectors and disposable hosting. The document body, though heavily obfuscated, contains a URL that appears to be part of a SEO-based lure, aiming to trick users into clicking through to 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://gettraff.ru/strik?keyword=genetics+probability+problems+and+solutions+pdf In PDF document text
    • http://files.rlcraftvinylstore.com/uploads/1/3/0/9/130968913/58d13e628dd.pdfIn PDF document text
    • http://files.fremontlocalfoods.org/uploads/1/3/1/4/131437295/lukurufifib-revipapawin.pdfIn PDF document text
    • http://files.delcacao.ch/uploads/1/3/0/7/130739532/6216363.pdfIn PDF document text
    • http://vedezip.hectorzenil.net/uploads/1/3/0/7/130740118/841586280c4f9d.pdfIn PDF document text
    • https://site-1036812.mozfiles.com/files/1036812/kutizusum.pdfIn PDF document text
    • https://site-1036721.mozfiles.com/files/1036721/64979454056.pdfIn PDF document text
    • https://site-1036630.mozfiles.com/files/1036630/48182319341.pdfIn PDF document text
    • https://site-1036955.mozfiles.com/files/1036955/ferufizuwad.pdfIn PDF document text
    • http://guvefap.ndsportschannel.com/uploads/1/3/1/3/131379478/wusogepesifefe-timevijatefa-tilijipozoki-xiwawaxariduki.pdfIn PDF document text
    • http://files.chicagoschoolofgrappling.com/uploads/1/3/1/4/131409170/312064.pdfIn PDF document text
    • http://files.londonfoodessentials.com/uploads/1/3/0/8/130814172/pabovowuxesubisitexo.pdfIn PDF document text
    • http://files.jonespaytonswimming.com/uploads/1/3/1/4/131437722/b03b7b868b8e88.pdfIn PDF document text
    • http://files.artofmccabe.com/uploads/1/3/1/0/131070723/6650425.pdfIn PDF document text
    • http://tuzawur.joysassgrace.com/uploads/1/3/0/8/130814241/zuvogesazomalurem.pdfIn PDF document text
    • http://nuzevof.isc-shippingconsultancy.com/uploads/1/3/1/4/131453870/gopelajujo-kekatiri-xiginabi-fonutepe.pdfIn PDF document text
    • http://files.samuraisharp.com/uploads/1/3/0/9/130969471/0f27fb623d772b.pdfIn PDF document text
    • http://files.dheifetz.com/uploads/1/3/1/1/131164293/lamuzixe-pufovo.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA885 5456 bytes
SHA-256: 40c8c1b1de3562636a4cd6cc1a0472f2affc081bda4eb2a85f7d8f053410c8ea
font_01_sfnt_off0000bafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAFB 14996 bytes
SHA-256: c8efd85797462ea7fe320e2017bf3b92ff334e2e433082d8e663c206202daf69
font_02_sfnt_off0000e9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FE 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e