Malicious PDF — malware analysis report

Static analysis result for SHA-256 87238ea261e28cb6…

MALICIOUS

PDF

43.1 KB Created: 2020-08-11 02:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a9a824901d1e04827a2a5ff73426aa21 SHA-1: beb80a516936984933ceace65471c41bd06baf73 SHA-256: 87238ea261e28cb6cabb7a763fb89679924431ebf801758f590501877d0f295c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting a phishing or scam attempt. The embedded URL `https://ttraff.com/pify?keyword=zener+diode+as+voltage+regulator+pdf+notes` is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest it's designed to exploit vulnerabilities or trick users into visiting malicious sites, likely as part of a broader phishing campaign.

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=zener+diode+as+voltage+regulator+pdf+notes In PDF document text
    • http://files.vantjones.com/uploads/1/3/2/6/132682905/tamijib_xomisi_gatofoba.pdfIn PDF document text
    • http://sopet.kvarnertrails.com/uploads/1/3/0/8/130814297/pekatitedelenosijom.pdfIn PDF document text
    • http://files.didsburyjuniors.com/uploads/1/3/2/6/132681824/maxipupamekep.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/1/0431/8386/6007/files/vixakidilutidat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8133/4933/files/xezifikaxugupewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/7675/1261/files/lakshmi_narasimha_kavacham_in_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3881/0010/files/mejanasod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9850/3336/files/56313013059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/97860196840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6234/5384/files/wukinugisidokebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3031/5159/files/39393282174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/92875364736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3596/7143/files/zizalewumevudisofate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4392/9762/files/notekobakidogomepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7061/0851/files/sara_meeks_osteoporosis_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8281/7441/files/btec_business_level_3_book_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/dajejopuf.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA7 5224 bytes
SHA-256: a23da8e72e705acca3770e1be17f24c4936612f1c33daa468e8c5854c15868d5
font_01_sfnt_off00007c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8A 10068 bytes
SHA-256: 3da28828db8814e8fd2221f7a708ba3a73baeeaf9b860aa2edda20dca18934c5