Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e8f520f27834cd…

MALICIOUS

PDF

42.0 KB Created: 2020-08-19 23:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e38f18e1d7ac73e3de5d502648c7cc51 SHA-1: c27ac792d24ad3aecfbe83b7226811afc8718bfa SHA-256: 98e8f520f27834cd5a485d656ca07728dcf60016b0a15e1b24930f1eca03f1d1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to educational content. The presence of a PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing and the ML_NYX_PDF_MALICIOUS flag strongly indicate malicious intent, likely to redirect users to phishing or malware distribution 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=lesson+10+fragments+and+run+ons+answers In PDF document text
    • http://files.pack301stmarys.com/uploads/1/3/1/4/131452982/zusadodutug.pdfIn PDF document text
    • http://files.wendywangauthor.com/uploads/1/3/1/8/131856852/duzesurawezu.pdfIn PDF document text
    • http://files.nanasrecyclables.com/uploads/1/3/1/4/131452903/nezujoj_rejilobinip_vigiwipulijuxi_sodoxiriviwa.pdfIn PDF document text
    • http://files.trinitylutheranpreschooldarmstadt.com/uploads/1/3/1/3/131383456/dekizeribofe.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/1/0429/4151/3894/files/dijekusopodawasuvotezok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4504/1814/files/shree_mahalaxmi_calendar_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/3358/7875/files/74133838227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nexunalazuzifoginiwaboliz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/8263109845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/3690/4346/files/19317304523.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2908/6876/files/42888274496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7244/4823/files/55502313330.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 7

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_off0000588e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x588E 5256 bytes
SHA-256: 1b60da39c19f82db30ce8c56f4f2a7ed88b924daf5d082220e6c42ca126729c0
font_01_sfnt_off00006a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A67 10148 bytes
SHA-256: 6c225e6d40c230972ea8c06a4458c11452d3c6bf818239bb387aca8bbfd981ef
font_02_sfnt_off00008d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D08 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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