Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b1563f92fa39af…

MALICIOUS

PDF

41.9 KB Created: 2020-08-25 03:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a4cb638a9fad3b97ad3a732e4e895f9e SHA-1: 44d8b63adccfb4be124a04a38a1cd55e9b1e6a02 SHA-256: 86b1563f92fa39afe37ba79a7d7864d10c77cafa2b552895635a8e6ee063d278
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or scam attempt using a link farm 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.ru/pify?keyword=armenian+keyboard+for+android+tablet In PDF document text
    • http://files.hardemanschool.com/uploads/1/3/0/7/130739783/vigofowa.pdfIn PDF document text
    • http://files.cornerpostcowboychurch.com/uploads/1/3/1/4/131438718/eabd7baf1756.pdfIn PDF document text
    • http://files.upperteesdale.org/uploads/1/3/1/3/131384442/63e98a83bcf.pdfIn PDF document text
    • http://gunegolof.mendedwingtheatre.com/uploads/1/3/2/6/132683014/dowuguvogigodowenapu.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/1/0432/5107/3174/files/2017_school_pronouncer_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/8384/2982/files/7429817579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1698/5498/files/dj_shadow_sixdays.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/damegadunuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/renewable_energy_systems_advanced_conversion_technologies_and_applications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6045/2760/files/91243413804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8936/2086/files/life_cycle_of_bacteriophage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6712/0539/files/poulan_weed_eater_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6992/1690/files/align_right_large_cabinet_hardware_installation_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8068/7524/files/71094706468.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 7

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_off00006575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6575 5168 bytes
SHA-256: 43c852fcd730670d2117d01c00d1fb8eec9cdc2dfea5a122a21c8df580b274c4
font_01_sfnt_off000076f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F3 10520 bytes
SHA-256: 2655a01d06ab48e653c182db4410a9a59e4b22d8342e5855816642d8f5a9f1c6

Open this report in the interactive analyzer, or submit your own file for analysis.