Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dea6aa7d74a8a49…

MALICIOUS

PDF

116.2 KB Created: 2020-08-01 23:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5b2934f797ee1584237e7f3dead6a26c SHA-1: 03db079405de644382179cb6a1066da493600192 SHA-256: 0dea6aa7d74a8a4940c22a4820508184bdd67294df8200f4b00569db2b08ce2b
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a URL associated with malicious redirector infrastructure, specifically designed to lure users with seemingly legitimate content like textbook solutions. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

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=operating+systems+concepts+9th+edition+pdf+solutions In PDF document text
    • http://files.gobrazil.co.uk/uploads/1/3/0/8/130874304/e62ac.pdfIn PDF document text
    • http://files.alamosavalleyhumaneleague.org/uploads/1/3/0/7/130738534/nawigin_ferovezoda_sikiw.pdfIn PDF document text
    • http://files.graceandgloryyoga.com/uploads/1/3/1/4/131483148/tonuvefezux_nilotixa_fonivarifixa_kedegijogedif.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/1/0427/6997/3415/files/99383462876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5015/3622/files/24936386683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7541/9812/files/72789294398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/delete_time_machine_backups.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/lavipukapumixegovelap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9290/8963/files/niwagafise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8197/3403/files/charter_spectrum_bozeman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/widis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/19326716116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/babape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7895/8758/files/17912846976.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000183f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183F0 5852 bytes
SHA-256: fa475e38d1c026dc36708614b84fa37c5bbedceca29bc06ee1f526908f6a1b47
font_01_sfnt_off000197b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197B8 13940 bytes
SHA-256: f201bc8e654dfcb98e9ee4a2da6bf63e17ed25eb28e26a9738d9f41d1ed78585

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