Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f09719422316d22…

MALICIOUS

PDF

73.9 KB Created: 2020-08-04 18:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 427b3bea4d149683063dc57fc8ff7543 SHA-1: db114473582989d9fa530b65b089c7c91c0aad7d SHA-256: 4f09719422316d22328610cd70152f3f21de1acde0cb9b0db5e1a5c791695bde
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the string 'bed rail assessment pdf' and the malicious URL 'https://ttraff.cc/pify?keyword=bed+rail+assessment+pdf', indicating a lure to a malicious site. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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.
  • 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://ttraff.cc/pify?keyword=bed+rail+assessment+pdf In PDF document text
    • http://files.carmeldachshundclub.com/uploads/1/3/0/7/130739809/666fbd327a04.pdfIn PDF document text
    • http://files.peoplestories.net/uploads/1/3/1/4/131409677/tuwazakugurade-sugow-wupikof-kevepefiz.pdfIn PDF document text
    • http://files.busybeeorganize.ca/uploads/1/3/0/9/130969004/gojebifazalomo-maxurapokenoxo.pdfIn PDF document text
    • http://files.blackwolfknives.net/uploads/1/3/2/6/132682882/9a9fea.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/1/0432/6916/1110/files/97269136768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zobirunutopuwipigodilig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/ladunojilered.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/13533293228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6393/4105/files/24126614419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7851/5864/files/33381381422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0636/0730/files/merge_files_mac_os.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2385/8845/files/20955631428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/aaron_lewis_country_boy_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1436/4059/files/bewivujomurixupu.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_off0000daa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA7 5236 bytes
SHA-256: 13290d8806320aadef656db8bc4661069d5690ce183250d2a0ceb7235442fc9c
font_01_sfnt_off0000ec5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5F 14768 bytes
SHA-256: ed0d34b7a91267ec83f3e75c4dcfab13b495e32195560cf9d402e75795880d64

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