Malicious PDF — malware analysis report

Static analysis result for SHA-256 555849c85ebfde29…

MALICIOUS

PDF

47.4 KB Created: 2020-09-10 04:40:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1a8deccf03fb0e014a86afbacf986a17 SHA-1: cb3400aafbd779eef85ad43c52cc7b7eb3f505ec SHA-256: 555849c85ebfde298364621fda53dca7f83e84e954485aef9f917abee42a7f72
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to a known malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.club/pify?keyword=atrial+myxoma+guidelines', suggesting a lure related to medical guidelines. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of these links. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning and traffic redirection.

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/pify?keyword=atrial+myxoma+guidelines In PDF document text
    • http://files.twoforestplaza-leasing.com/uploads/1/3/1/3/131378921/2856213.pdfIn PDF document text
    • http://fesawix.tidygardensfencing.com/uploads/1/3/1/3/131384169/2839410.pdfIn PDF document text
    • http://files.davertskate.com/uploads/1/3/0/7/130739462/44d127c5ea638a.pdfIn PDF document text
    • http://dofap.challenge2grow.be/uploads/1/3/0/8/130873998/fujiwesotafa.pdfIn PDF document text
    • http://files.eventsbyjade.com/uploads/1/3/0/7/130739483/7f2f6.pdfIn PDF document text
    • http://files.estellessweetitchblankets.com/uploads/1/3/1/4/131409170/tixavaxanepuluxuvit.pdfIn PDF document text
    • http://files.happyyouarehere.life/uploads/1/3/2/3/132303337/tuvatusokokakamop.pdfIn PDF document text
    • http://lakerev.pamelaarmstronggallery.com/uploads/1/3/0/7/130776693/mumugafetixugu.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/1/0463/3214/9915/files/pelowelijeraza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7928/5401/files/the_smallest_dragonboy_short_story.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2868/4701/files/vepuruvitu.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a44510_34e1edd8bd11453d9e2deed04d1434bf.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/dcfb95_b5fe5be91e96485785957d4dfbdd1bf6.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000792a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x792A 5304 bytes
SHA-256: 3aa4176bff074eae6baaf6a93f38f7153c34de3f44efdfe243a598e6c919312e
font_01_sfnt_off00008b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B29 11360 bytes
SHA-256: 58aaed61eebef58028c5b9cf536fdda539c8fbda2771a0813fcce2d407029b63

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