Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c6366772fa302b…

MALICIOUS

PDF

74.6 KB Created: 2021-01-10 11:44:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c89f22ffbd07321acc9d2ae879ce2fbb SHA-1: 905816b5a57294c4deada2d014519290b90be408 SHA-256: 11c6366772fa302b9aebdeb933f6cb57807734eb6144e8f6662c8888d6f0b7a1
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous embedded links designed to redirect users to malicious websites, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The primary redirector URL identified is https://traffine.ru/aws?utm_term=metal+platform+bed+frame+twin+xl, which is part of a link farm strategy. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://traffine.ru/aws?utm_term=metal+platform+bed+frame+twin+xl In PDF document text
    • https://sikufotoxatufik.weebly.com/uploads/1/3/4/4/134458503/8afb0c7bcf8c215.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/eJJmNjb/kefumaborome.pdfIn PDF document text
    • https://zunutupere.weebly.com/uploads/1/3/1/4/131453944/tikosonuperer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370530/normal_5f8e96526ebf6.pdfIn PDF document text
    • https://cdn.sqhk.co/jivapereb/O6hixie/modopuketawejazer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386620/normal_5f8d3ef05d763.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/sugaguxagu/bodybuilding_routine_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/what_is_the_difference_between_heat_and_temperature_in_physics.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/bootstrap_4_cheat_sheet_hacker.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/70018013608.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/52533964164.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/belief_systems_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/97610780267.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/adobe_acrobat_to_ms_word_converter.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/access_bars_sorular.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 4

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_off0000e617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE617 5316 bytes
SHA-256: 1404fafb52758d0a094573311b9c053457b2cac44ac638f2dd6a3372df18a036
font_01_sfnt_off0000f832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF832 10876 bytes
SHA-256: da51dc236cc8e4f73235fade42255126dbb673a3df35719b48e5f2e5b851100a

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