Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d53787c46d55f5b…

MALICIOUS

PDF

37.4 KB Created: 2020-08-25 14:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2cd88d76a5f318906019b2f784887420 SHA-1: 8b777ab9a5184fb44c675d37c0657a68a70ab726 SHA-256: 6d53787c46d55f5bfa21596d815bebf5557c18341bcef8bed1f0e94866787d42
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, includes the URL 'https://ttraff.com/pify?keyword=scholastic+guided+reading+level+m', suggesting a lure related to educational materials to trick users into clicking through to a malicious site. The ML classifier also strongly indicated maliciousness.

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=scholastic+guided+reading+level+m In PDF document text
    • http://files.bscchicago.com/uploads/1/3/1/4/131453645/7940535.pdfIn PDF document text
    • http://zofuge.craigheadresearch.org/uploads/1/3/0/8/130873965/verijepar_jopebowe_zifetobawa_ximenulowun.pdfIn PDF document text
    • http://benusapi.yvonnegordonmoserart.com/uploads/1/3/2/8/132815758/mapagufaboj.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/1/0431/0512/4503/files/little_black_boy_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/faxegos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3590/0569/files/bribery_in_business.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9074/6271/files/www._fieldglass._net_timesheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5326/0706/files/83431247739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6955/4340/files/biconditional_proposition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8312/7201/files/28487791929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9713/6030/files/velako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/angielski_w_tumaczeniach._sytuacje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5202/3458/files/rolakuvilulixeroxakox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42479515564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7209/4362/files/59040923798.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 2

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_off0000540f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x540F 5516 bytes
SHA-256: 96bc01b38a0c8090855bb39815cd77d25e68a708d9add4b2d0d956f574263fde
font_01_sfnt_off00006698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6698 10260 bytes
SHA-256: dc814084fb2e85e8460901875daf3b283445941aa9069fc11674b28cb8db5600

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