Malicious PDF — malware analysis report

Static analysis result for SHA-256 691ead2625dde2fa…

MALICIOUS

PDF

43.2 KB Created: 2020-07-31 03:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0153acd3205dedecdd6b3afaf22b1db2 SHA-1: 50578a645e043c2493ef241b8567a5948dd31207 SHA-256: 691ead2625dde2fa658f5e1c7bf25366d8dab851769c810801613b1d31792d95
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 points to a known malicious redirector, which likely serves as a lure for users seeking a PDF editor. The ML classifier strongly supports the malicious verdict.

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/wb?keyword=pdf%20editor%20online%20no%20watermark In PDF document text
    • http://files.dharmayogawheel.com/uploads/1/3/0/7/130775197/pekalebosov-doburutuwidunoj.pdfIn PDF document text
    • http://files.mnconference.org/uploads/1/3/0/7/130738892/vogejuxov-zuwuxiz.pdfIn PDF document text
    • http://files.alexandraportersoprano.com/uploads/1/3/0/7/130776812/wixajutunuxajediwava.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/1/0427/8226/1415/files/vixudonabog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sabam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/29985109531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5225/2829/files/40382075737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0812/3303/files/povevegilatoruke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/bavuxokuvozukopisug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6232/1571/files/mupejebex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8774/9529/files/973345145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/96452425375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/19276905720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/wuvotujoxamadakex.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 6

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_off00006da7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA7 4820 bytes
SHA-256: 98a7513b987da62cdd9dcebdabcfc1227cab2771884517adfd5daab2c4066125
font_01_sfnt_off00007df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF4 9944 bytes
SHA-256: 120e2f912fdd471d5abfd2e11fad925bb556875a994faeddc15bd017d318375d

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