Malicious PDF — malware analysis report

Static analysis result for SHA-256 b91e1b555f278c0c…

MALICIOUS

PDF

42.8 KB Created: 2020-08-23 03:28:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f2d4a59d8f293d6dc5139612046718c8 SHA-1: 0a63b2a3a8187812465066560459cc0965af3ef2 SHA-256: b91e1b555f278c0ced20817a3c042f9d8a4cd8cf9fc46516431f47f4742eb93c
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Halloween costume contest guidelines' and a URL that matches the malicious redirector. This suggests the document is designed to trick users into visiting malicious sites, likely for phishing or malware distribution.

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.com/pify?keyword=halloween+costume+contest+guidelines In PDF document text
    • http://files.realmccoycabins.com/uploads/1/3/1/6/131637402/parulapi_wonegelu_saxafo_dorarowi.pdfIn PDF document text
    • http://files.neworleansmidwives.com/uploads/1/3/0/7/130775850/tulavekew_gamokozudubo_zekabe_kisifaz.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/1/0431/1059/6775/files/blogging_platforms_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4091/3046/files/joguzogekuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/lefevalupoxebumunekawez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0337/8839/files/junolanijiwudusig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/39340536574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6945/7055/files/watijibaxaniber.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2024/7462/files/87713453163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/3110/1345/files/fexejajomigetalew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tobilefoseparavako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7406/8390/files/31743600052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7362/5500/files/farming_simulator_2015_american_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7355/1001/files/61933408385.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_off0000685e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x685E 5216 bytes
SHA-256: 0fd41739f3debfc5a94720dbf083a46f4d5ca6b052e385051f26e406fad2ab4c
font_01_sfnt_off00007a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1C 10628 bytes
SHA-256: 4451ac2cd0a52d0fff22cfd98207ed44480434997b8ecf342697cf3fbe181f8b

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