Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad11b75c4303bdb…

MALICIOUS

PDF

59.8 KB Created: 2020-12-16 00:39:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 9ab29ca174f5b42f0255e495aad9601c SHA-1: c6bb62fcdbae75128acdc446705b1f6fab960299 SHA-256: 8ad11b75c4303bdb99831061530b27693946689d51337b728c89858bb97d0d52
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to disposable hosting services, indicating a link farm designed to redirect users to malicious sites. The presence of a known malicious redirector URL and ClamAV detection further supports its malicious nature. The document body appears to be obfuscated or corrupted, but the heuristic firings clearly indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=sonic+milkshake+calories In PDF document text
    • https://lovaxases.weebly.com/uploads/1/3/4/6/134685664/kirufiwiz-tevokawuxiborin-wizowagino-bizuxa.pdfIn PDF document text
    • https://sutafufig.weebly.com/uploads/1/3/4/4/134402916/kusanibokan-rikokidetulif-kerixamufus-lekapuseduf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386605/normal_5f8ded6715191.pdfIn PDF document text
    • https://geserani.weebly.com/uploads/1/3/4/3/134347405/zipisurulozitaribe.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/1335590.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/fatafanutojor.pdfIn PDF document text
    • https://bulugigedi.weebly.com/uploads/1/3/4/7/134714886/74786d18ac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/vovotopafadeb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc110906609fd0ee7923de0/t/5fc11e1e145a8629dcd8d879/1606491684639/tasefuvikewopedapevamuza.pdfIn PDF document text
    • https://s3.amazonaws.com/xatojem/80041411912.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1dda692c50b1a1e7e4a1d/t/5fc70cdf5060c93fcd749fad/1606880479404/java_bounce_ball_game_free_download.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFF7 5208 bytes
SHA-256: 0005aca7220aeb18ed86581236b17eee988d59b6e2e51f2af72f2d9aa345514f
font_01_sfnt_off0000c17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC17D 9688 bytes
SHA-256: 1b0cb1aa679a1978531b798e75f48cad199f1005221887dcee6e61db25a14b60

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