Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c5927d2227b2c9…

MALICIOUS

PDF

51.5 KB Created: 2020-08-09 15:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c2bc5efa40e915501eaaa2190c95a17f SHA-1: 339772a63093d6665949ae2f4e4d01769bf86e50 SHA-256: 40c5927d2227b2c9720c8ff4ba65404b4169ba47b70ef5523d6e43afdbac9f7a
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for a 'computer abbreviations list pdf download'. The primary malicious IOC is the redirector URL, which is designed to lead users 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.com/pify?keyword=computer+abbreviations+list+pdf+download In PDF document text
    • http://files.angeecasson.com/uploads/1/3/2/3/132303092/4242498.pdfIn PDF document text
    • http://files.fallentreeexhibitions.com/uploads/1/3/1/4/131406258/7727261.pdfIn PDF document text
    • http://pojor.cathedralbluffoutfitters.com/uploads/1/3/0/7/130775436/256e6.pdfIn PDF document text
    • http://files.mosaicsbysandisykora.com/uploads/1/3/1/4/131406659/rafofagole.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/1/0431/4952/5149/files/doroka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0413/2508/files/pamisuzezoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/java_bank_account_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/tejukixudizanolesugevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5152/2977/files/48057313374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7080/7459/files/16308394875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4535/4658/files/tixosovepubesejupem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jatud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7333/9559/files/wegadamugagod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3668/0102/files/9232677525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6934/0822/files/51487634475.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9373/7118/files/24825346199.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_off00007fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA0 5384 bytes
SHA-256: 3789e3863d4d6505d2d0657a51a62c10af20b617a142134a78285403907bd79d
font_01_sfnt_off000091dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91DC 14852 bytes
SHA-256: d81a60b04314d6e42e0bec64f48e3db1cf0c9af356c4c491bc8535ba98441233

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