Malicious PDF — malware analysis report

Static analysis result for SHA-256 61bee84b8344459a…

MALICIOUS

PDF

42.7 KB Created: 2020-08-03 19:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a208146a2f90bf006267195d0a91e00c SHA-1: c5f5d7692fd8e70a732fb1a8030c04e18526e2a4 SHA-256: 61bee84b8344459a28fac58e325abf5da206a42e257f746327aa49c4c74d0b90
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is disguised as educational material ('algebra 2 lecture notes pdf'). The presence of many external links, including benign ones on Shopify, suggests a link farm or SEO poisoning tactic to attract victims. No scripts were extracted, but the primary malicious behavior is redirecting users to a harmful URL.

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=algebra+2+lecture+notes+pdf In PDF document text
    • http://files.lrmha.org/uploads/1/3/1/4/131483336/solawugukasij.pdfIn PDF document text
    • http://files.ps111adolphsochs.org/uploads/1/3/2/6/132695805/c23b0320.pdfIn PDF document text
    • http://files.philly-anywhere.com/uploads/1/3/0/8/130874110/4810952.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/1/0428/6060/9703/files/xagazilipepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0835/8561/files/whirlpool_super_capacity_465_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/wakapedabazexusenarulafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/75949765244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5317/0339/files/rowujomadesofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dipudakafadaned.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/45489673288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/28242364456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6838/3641/files/59638580307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6547/5229/files/gunoxagu.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_off0000681a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x681A 5584 bytes
SHA-256: 4f6e1ec9c9998e4319dc582328aa244ae26d0af3b4710fb316a69814b04c6977
font_01_sfnt_off00007b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B26 10300 bytes
SHA-256: ada8a9d5ba29a6a66f4d0d0b82714107818b1869c07a03dbbe844ee91464c675

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