Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f90b312d290dab…

MALICIOUS

PDF

40.4 KB Created: 2020-08-11 21:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 604eee9254c0da902f3774d4ec06369d SHA-1: 8b0d2112bbc3c2746e77e136c3195fe5964066ce SHA-256: e8f90b312d290daba02a3563240530ffcfe0e080d9022fcae6240c995a171089
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'esl appearance vocabulary pdf'. The primary malicious IOC is the redirector URL, which likely leads to further 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.cc/pify?keyword=esl+appearance+vocabulary+pdf In PDF document text
    • http://files.jamesriverartleague.com/uploads/1/3/1/6/131606890/dokeduzod.pdfIn PDF document text
    • http://files.vaniteesllc.com/uploads/1/3/0/7/130776196/jomiguvuxevilawakok.pdfIn PDF document text
    • http://files.emorylanedesigns.com/uploads/1/3/1/3/131383580/8885572.pdfIn PDF document text
    • http://files.xopthings.com/uploads/1/3/2/7/132740186/1643348.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/1/0431/6423/7992/files/wovokujigiwamiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/46931219882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/mevipateweponesus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9580/9431/files/drawer_track_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5366/1858/files/briggs_and_straton_boat_motor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5639/0559/files/gosumit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1092/3423/files/jejekodir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6749/7884/files/jijexakagebofujapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/17049700689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1632/1184/files/83176894144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2408/0282/files/20029981994.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 3

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_off00006065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6065 5408 bytes
SHA-256: cd7cecd30dbd6a432b7e29a892077d0f676e8e04bad4fc5640e5b19b8967406f
font_01_sfnt_off000072db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72DB 9980 bytes
SHA-256: 15138e4b44de9ae9cb2905a7dc3ad856147affa2d33615333ed1b128cdb6f147

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