Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f0f685c8dbc1735…

MALICIOUS

PDF

74.6 KB Created: 2020-08-01 10:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bd6cf491bf56608b9554fffbd0734727 SHA-1: a91e09dbd77f5280d50384d3122951945ed0bdec SHA-256: 8f0f685c8dbc17351f82254ffb14ac92b701d9788a2921022c6545173bb86568
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating an attempt to lead the user to a harmful website. The document body, though heavily obfuscated, contains text related to 'March Madness 2017 bracket pdf' and a URL that appears to be part of a redirection scheme. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' further suggests a social engineering pretext for the malicious link.

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=march+madness+2017+bracket+pdf In PDF document text
    • http://files.kateuhlirartists.com/uploads/1/3/1/4/131483184/lobupitekuvozo.pdfIn PDF document text
    • http://files.tsabs.bg/uploads/1/3/1/8/131856539/50b2c1e5.pdfIn PDF document text
    • http://files.body-knowledge.com/uploads/1/3/2/6/132681824/2094315.pdfIn PDF document text
    • http://files.gtrnet.com/uploads/1/3/2/7/132740214/8645281.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6924/2534/files/skyrim_special_edition_save_cleaner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2660/4447/files/20490739411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0097/7816/files/50548094376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1379/9066/files/77687030874.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5709/4559/files/terutoropugolofabukepos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7306/1532/files/32718050581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5318/7221/files/ziwetuvavarevunep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2028/8153/files/83217589507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/11831928182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9067/3813/files/zukomax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6533/6217/files/vutilusuzinikifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4364/2773/files/tanafefozugefowutigawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/89034026116.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83B 5608 bytes
SHA-256: 34e34144374a6d87278cd3c3c93618a3663f958a53d25949163a9f91e4f5b7f8
font_01_sfnt_off0000db21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB21 16552 bytes
SHA-256: 9e7de91d8b2b57e1ecba9223b7b8edbe5ef0408da069bd86c1cc004b1e4ebf94
font_02_sfnt_off00010e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E91 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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