Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1668ac250160065…

MALICIOUS

PDF

37.1 KB Created: 2020-08-22 12:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 53185a76db72bb77732b8120ec54a56d SHA-1: 791aa0ea57c35bb7a92df3841d3a7ebd17f50ad3 SHA-256: d1668ac25016006547bb0a361ebb8eccd343aec0f2e5352a7a6a66962cb3f544
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=algebra+nation+section+7+answers+pdf'. This URL is presented within the document body, disguised as a search result for educational material. The PDF also exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains hosting other PDFs. The primary malicious link likely serves as a lure to a secondary malicious site or payload.

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/pify?keyword=algebra+nation+section+7+answers+pdf In PDF document text
    • http://files.misstimstravels.com/uploads/1/3/1/8/131871602/sugaf_riniva.pdfIn PDF document text
    • http://rabom.bsl-sc.co.uk/uploads/1/3/2/7/132741508/xutalebegogakepona.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/rugofepuwosuronakuwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1543/0553/files/50649552745.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8651/9197/files/crimes_contra_a_administrao_pblica_resumo_concurso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/4855769619.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8073/6156/files/97798627002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8531/5737/files/15409665119.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5505/3989/files/mopujijutuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6163/1384/files/biostar_handbook_student_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6617/0271/files/zudoxobox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7547/7414/files/vande_mataram_movie_songs_320kbps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8098/2432/files/97920877839.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
🗂 Part of campaign: bsl-sc.co.uk 3 samples

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45D7 5412 bytes
SHA-256: 7eb2a53ca459914ff76cd777e7a17dcbc767c62e0c8ece7ad031a29b4bfeb645
font_01_sfnt_off00005859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5859 10000 bytes
SHA-256: 39db8200d88dd3315dcef2e3ef44e140909c6f8dfdbee76b2df9b1f3d87bb75f
font_02_sfnt_off000079ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79BA 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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