Malicious PDF — malware analysis report

Static analysis result for SHA-256 c56e5f44e26a2e7e…

MALICIOUS

PDF

40.2 KB Created: 2020-08-15 06:27:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e8e4f922494ecac43c5fc363f99df438 SHA-1: 544d8327e47f111afa2306db25d224be64d44562 SHA-256: c56e5f44e26a2e7e0dab1ee9257623abb32886a23b97d2879cf61571176f9fd8
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a social engineering lure, presenting itself as an admission circular to trick the user into clicking a link. This link, 'https://ttraff.ru/wb?keyword=bsmrau%20admission%20circular%202019-20%20pdf', is identified as a malicious redirector. The document also contains a large number of links to external PDFs hosted on Shopify, likely part of a link farm to improve SEO for malicious content. No scripts were extracted, but the primary attack vector is the malicious redirector link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/wb?keyword=bsmrau%20admission%20circular%202019-20%20pdf In PDF document text
    • http://files.desertblossompreschool.com/uploads/1/3/0/7/130738889/mogozusekadoj-xopowajixajaxo.pdfIn PDF document text
    • http://files.vaniteevogue.com/uploads/1/3/1/4/131453843/nafixiwuvada-vakiremutapepa-tifipipida-semelivow.pdfIn PDF document text
    • http://files.ywampotch.com/uploads/1/3/0/7/130738513/nufebozerifuxi_denadafopuge_dodalep_kuxine.pdfIn PDF document text
    • http://tufagozoz.vastcomtech.com/uploads/1/3/1/0/131070805/41cfe.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/1/0427/9071/5548/files/kijowaleli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/48482327930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0857/3088/files/40957024769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9728/3996/files/brand_equity_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9259/0236/files/toda_la_sangre_bernardo_esquinca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51982080438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9023/1974/files/platelet_count_in_pregnancy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4800/0927/files/spell_compendium_3._5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/42565909684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8706/0375/files/83066239855.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_off00005d19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D19 5864 bytes
SHA-256: 1f4b20bbb09584e591a8d5d81a5fdbed7d8d67205d76f372d3ca0ab7c06c43f5
font_01_sfnt_off000070f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70F2 10284 bytes
SHA-256: 8340dd218b2288fd94818bb2735b4d44e6f0b623938008533caa51cff0983fdf

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