Malicious PDF — malware analysis report

Static analysis result for SHA-256 87235db40ad7456e…

MALICIOUS

PDF

60.3 KB Created: 2020-08-04 11:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ca48cc9c309b02d24f9329446e2ae1ee SHA-1: 2ca183199f7b6339434cab96c9482b48068988b2 SHA-256: 87235db40ad7456e994acb747ac8f3a4f6122df07a3713328386ce40ab65702f
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'adobe photoshop cs2 all shortcut keys pdf'. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links suggests an attempt to drive traffic to potentially harmful sites.

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=adobe+photoshop+cs2+all+shortcut+keys+pdf In PDF document text
    • http://safiviro.varvelinstallations.com/uploads/1/3/2/6/132681647/531f2ccb.pdfIn PDF document text
    • http://files.lamotteviolins.com/uploads/1/3/1/4/131406811/jesowavafukev-migol-levijaxoduneki-sugonuja.pdfIn PDF document text
    • http://files.pjobrienbmx.com/uploads/1/3/1/3/131383630/540258.pdfIn PDF document text
    • http://files.sawelsh.com/uploads/1/3/1/4/131454151/09b9b05.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/1/0428/9835/8432/files/voriwatovetizejewadodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/wow_classic_the_videre_elixir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gubiwunezekubukezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6457/2569/files/47810966293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/62865587555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1342/2753/files/farafowuwezemegoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9631/7845/files/54294451464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/45824492503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2197/6220/files/74625435123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/mowufegupepekuzurapone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99781003244.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 5

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_off00009e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E81 5668 bytes
SHA-256: 8d140b31884ca013e162447d46c89b44b7bef346e9d4aa8af5d7f85d90b6fcac
font_01_sfnt_off0000b1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1CB 15636 bytes
SHA-256: 049e3d211ad62c440c80410e3da53ccfbd590f42d5b95e3cfe07110f6bf82822

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