Malicious PDF — malware analysis report

Static analysis result for SHA-256 a92433925baf0805…

MALICIOUS

PDF

145.5 KB Created: 2020-09-18 03:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f01831aea73f67145218606ae10dea83 SHA-1: f8dab789a808a0d2cec63553140413787126addc SHA-256: a92433925baf080511d10d4b4dd384964c94020b61f9b7fb1a5576d58a565f05
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'nature study guide' and the malicious URL, suggesting a lure. The ML classifier strongly indicates maliciousness. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.link/wix?keyword=a+nature+study+guide+furneaux In PDF document text
    • http://files.sacredghostrecords.com/uploads/1/3/0/8/130874220/1911394.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/1/0431/7279/0428/files/82094524469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4237/1741/files/guzaberimixojulawojijul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4723/7285/files/tuxumapudegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5227/6632/files/minuet_3_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/6924/3297/files/17738242613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4958/1724/files/sinbad_magi_djinn_equip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/10622628810.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4832/1692/files/tofaxufafunuxijifarub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8037/5702/files/5549701347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5849/3600/files/exemple_d_attestation_d_emploi.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_off00020023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20023 5204 bytes
SHA-256: 7844325559d892c9e9e9d22227586570a88922923952c5641f6f3eb704978ac6
font_01_sfnt_off000211f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x211F2 11620 bytes
SHA-256: 3c1ca6566d095c3802d0340244e6d22dbf4919adb8c7d123bb710a6c188ca463

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