Malicious PDF — malware analysis report

Static analysis result for SHA-256 73a98eb06a28c7e8…

MALICIOUS

PDF

36.1 KB Created: 2020-08-10 16:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a84c1df7c8c0d7a26dd1cbb5b77baf23 SHA-1: 93e5c0e65dd947614d5e99a49f854ac473ab0a47 SHA-256: 73a98eb06a28c7e8fa109faf83a146da0b23bc7618a5968f498f21200fc7c66f
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are identified as redirectors to malicious infrastructure. The document body, though partially obfuscated, includes a URL that appears to be part of a SEO link farm designed to lure users with seemingly legitimate content like worksheets. The presence of multiple PDF links and a critical heuristic firing for malicious redirector links strongly suggests a phishing or malware distribution attempt.

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=irregular+plural+nouns+worksheet+pdf In PDF document text
    • http://luwiripon.tntelitesportsacademy.com/uploads/1/3/1/1/131164048/buwopodedinibomo.pdfIn PDF document text
    • http://files.oasystec.com/uploads/1/3/1/4/131408432/degotosamo_bexavolejaz.pdfIn PDF document text
    • http://files.benmoorestudio.com/uploads/1/3/0/7/130775690/8462354.pdfIn PDF document text
    • http://files.raisingrain.com/uploads/1/3/1/4/131438059/pefovatax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9717/0847/files/sopuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2292/6492/files/pukowodurukuwususegodef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3266/4481/files/21372912353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7141/4173/files/80695797226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1265/1170/files/80750317662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6375/4404/files/34371498745.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/51306955739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5081/0014/files/25232290197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7346/0641/files/49957368917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/juxupajajivamuwiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1080/8213/files/zozefuzexekeku.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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000450e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x450E 5228 bytes
SHA-256: 96e1bcf78debeb0ca5c13fed73bd7f0496cb3dc61ad13b53caded16e4271ceaa
font_01_sfnt_off000056da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56DA 8920 bytes
SHA-256: 2780ee1faa2330615447e34d65ffdbd5dc343500b69a27531afa44a083e94e24
font_02_sfnt_off0000754b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x754B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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