Malicious PDF — malware analysis report

Static analysis result for SHA-256 168e322b5e2a78dd…

MALICIOUS

PDF

40.3 KB Created: 2020-08-11 13:32:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3079d3a576a1f34e5bd18ff57f651741 SHA-1: 3d768e43f46f15e342002ffe1dad7aff2ca8c885 SHA-256: 168e322b5e2a78dd88393c5302493bfcf49223eeb29b547581877bf7f5c87671
194 Risk Score

Malware Insights

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

This PDF file contains numerous links, many of which point to a redirector service known for hosting malicious content. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=boolean+algebra+lecture+notes+pdf', which is flagged as a malicious redirector. This suggests the document is part of a phishing campaign designed to redirect users to malicious sites under the guise of providing lecture notes.

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=boolean+algebra+lecture+notes+pdf In PDF document text
    • http://files.paulsullivanleather.co.uk/uploads/1/3/0/9/130969820/mexagoruxulo_mepitazavijeluk_wulafikobaxij_wibupako.pdfIn PDF document text
    • http://gizeda.csobecancour-en.com/uploads/1/3/1/4/131482962/8770124.pdfIn PDF document text
    • http://files.brooksidevt.net/uploads/1/3/0/7/130775732/01f633e468e3.pdfIn PDF document text
    • http://files.lowersavannahriveralliance.org/uploads/1/3/1/4/131407178/3fba4c940e7196e.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/1/0432/5238/3904/files/32608676306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1504/4254/files/15556293664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6750/6849/files/loxodukelagunavizob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8615/1833/files/mahatransco_syllabus_for_assistant_engineer_electrical.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/13667856365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5121/9104/files/tidejivomimarakamok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/dekaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72274594547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/23881051949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9000/9502/files/detumefozupigulizasujaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4839/4143/files/79536397274.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/xuweniva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0018/4477/files/mufeluzunagodise.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_off00005fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDA 5512 bytes
SHA-256: b558a3acea811c85f5c44f1d10f91ed10ec95a63343bb2bd62a1c53401966b3d
font_01_sfnt_off000072a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A2 9872 bytes
SHA-256: 0784000b6f77d36c04279aa56da4fbcc38e0531553efa57e799b657e61c2b5d1

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