Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b77041fe138902…

MALICIOUS

PDF

37.9 KB Created: 2020-08-05 18:13:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4fe0bc121fca570b22dceb224e45ffb0 SHA-1: e09cbfeac3d0a315bbc86cbda40de5644b1c8e10 SHA-256: 80b77041fe1389024ed1c6c44b61d8259809d31cb4c89f982feefde0305de55f
194 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to a redirector URL. The document body text, though heavily obfuscated, includes the redirector URL and appears to be a lure for users to click on these links. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL suggests an attempt to lead the user to malicious content or a phishing site.

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/wb?keyword=dialogismo%20bakhtiniano%20pdf In PDF document text
    • http://files.markcgarrett.org/uploads/1/3/1/3/131383613/4938918.pdfIn PDF document text
    • http://files.peculiaritypress.com/uploads/1/3/2/7/132740541/5bbbb36a7fdcd.pdfIn PDF document text
    • http://letox.diaryoffaith.com/uploads/1/3/2/6/132682051/rugedozivozew_wimuxami_nomowano.pdfIn PDF document text
    • http://files.projectufo.org/uploads/1/3/0/7/130739381/4877757.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/1/0429/5737/3589/files/vepajamupukewafepolos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/88111127638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/gadilegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9603/8812/files/finikemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/tusugenizixunafagenewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/kadexozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89462818099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/37379844586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4380/5591/files/bebitorumewafokepini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2973/2248/files/international_dialects_of_english_archive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/gasefapuxirubozetik.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_off00005380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5380 5560 bytes
SHA-256: d3b0c98ad5c265e1ee3207f33e594531de4566b39e76f7a8a79f5a26f88d51d8
font_01_sfnt_off0000664b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x664B 10712 bytes
SHA-256: 13603910f35fed2999d19b0d619b8fd55984f2aff7c7cc609537eadb56a33512

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