Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d30cefe8b840bd…

MALICIOUS

PDF

37.0 KB Created: 2020-09-14 13:06:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ed082472923c8c568fe382242b663c1a SHA-1: 90bb96ba56c1deea7a62c3fd1beeb50e5475ff05 SHA-256: 16d30cefe8b840bdf476fa6b3b76f8081855378afd33299cf1ffacce0f8befda
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains a lure for software keygens, directing users to a malicious redirector URL. The document is identified as a link farm on disposable hosting, and the ML classifier strongly indicates maliciousness. The presence of embedded URLs and the nature of the lure suggest an attempt to harvest credentials or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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=sony+vegas+pro+13+keygen+indir In PDF document text
    • http://files.ourhousecallvet.net/uploads/1/3/1/8/131857071/semosi-kimixasobal-baxokuw.pdfIn PDF document text
    • http://bakob.alievarts.com/uploads/1/3/1/0/131070718/18a5a6df4f7d94.pdfIn PDF document text
    • http://files.mauriceshapero.com/uploads/1/3/1/3/131381612/6257459.pdfIn PDF document text
    • http://files.sinkutradiatorservice.com/uploads/1/3/0/7/130739032/53431e11ae06e.pdfIn PDF document text
    • http://files.norcalholistics.org/uploads/1/3/0/7/130776485/3991bbddeec12.pdfIn PDF document text
    • http://loxudi.archetypeweapons.com/uploads/1/3/2/6/132696021/dusivusagu-fegil-koferurisak.pdfIn PDF document text
    • http://files.theequineadvisor.com/uploads/1/3/1/1/131163737/losokaf-jerapozezux-wiwoditux-xaxate.pdfIn PDF document text
    • http://files.bonniegreenconsulting.com/uploads/1/3/0/8/130813876/76d7a5c5.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/1/0450/6717/4040/files/monthly_calendar_december_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/mobilcom_debitel_kndigung_vorlage_kostenlos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5507/0880/files/37420270905.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d4579c_3d8b092c10524672881df723336c1daf.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9734e7_02b3c94649ec43fd87c6d1e20b0e1dad.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_off00005197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5197 5640 bytes
SHA-256: 309ccd7c3fb578bc11ef1ccf6c88fa8dd13408d5f9f194e91e1e496918e20ed0
font_01_sfnt_off000064f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F2 10108 bytes
SHA-256: 70542362655de9d5feb166a4c4cb88bfae8fbe8e44270ca327943d7a7e8201a2

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