Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8b679afd87996e6…

MALICIOUS

PDF

46.9 KB Created: 2020-08-26 10:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2961200a560ff1e7ca3d3ab42d27b460 SHA-1: 85f2a5f6ea4470d2bdab397eb3fdb219d6077dab SHA-256: f8b679afd87996e6aee7e6dae2be339704e00e35c815a17c82ed34031b051e29
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though partially corrupted, includes the text 'Anatomic pathology board review pdf' and the malicious URL, suggesting a lure to trick users into visiting potentially harmful content. The ML classifier strongly indicated maliciousness, supporting the presence of a malicious redirector.

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.ru/pify?keyword=anatomic+pathology+board+review+pdf In PDF document text
    • http://meribez.cutiepiepampering.com/uploads/1/3/1/3/131378950/komalin.pdfIn PDF document text
    • http://vexem.southwestpassages.org/uploads/1/3/1/1/131164250/4e5f9ad8c1.pdfIn PDF document text
    • http://files.placentaedmonton.ca/uploads/1/3/0/7/130776407/7938266.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/1/0431/7764/0092/files/rigivisekujixefibetunanup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6472/1562/files/algebra_formulas_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/15076513710.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6240/1947/files/moxogebasaleb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/5346/2183/files/checkmarx_jenkins_plugin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3371/4070/files/cara_afterlight_gratis_iphone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/crime_statistics_in_south_africa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6414/7609/files/bhagavad_gita_chapter_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/8625/8852/files/7162429922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8402/1921/files/puzukokanimeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/patolivozi.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 4

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_off0000751c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x751C 5776 bytes
SHA-256: 7458dd7950e416283a45141236ef5a76a62b3e63271d727a91581056e612f1db
font_01_sfnt_off000088b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B1 11184 bytes
SHA-256: e851a379250580cf5cfbd0af98b137c5bd68bb94cffe91f2830b316125ef2368

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