Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7d0a48623fcd9dc…

MALICIOUS

PDF

39.9 KB Created: 2020-08-15 22:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bbd894ea9fe1ff3db90f7768d45f4ceb SHA-1: 7559d3d3c17649a35f1904fbaaf82a930a2974ee SHA-256: b7d0a48623fcd9dc5b17e1a2c8989f3d35e728204fefce74862783bbb8aff0ee
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used for SEO poisoning or to host malicious content. One of the primary links redirects to a known malicious domain, ttraff.cc, suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, indicates an attempt to disguise the malicious intent as an educational worksheet.

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=present%20tense%20worksheet%20for%20grade%203 In PDF document text
    • http://files.caresga.org/uploads/1/3/1/3/131379343/xaxukebutuzinup.pdfIn PDF document text
    • http://duzolirim.roundthecampfire.org/uploads/1/3/1/1/131164250/e8c9b5f5f7c71.pdfIn PDF document text
    • http://files.changlaoshiclassroom.com/uploads/1/3/1/8/131857758/5489288.pdfIn PDF document text
    • http://files.mrrclassroom.com/uploads/1/3/0/8/130873995/zifupekeluxut_lijavopupuwima.pdfIn PDF document text
    • http://files.humboldtcountychamber.com/uploads/1/3/1/1/131163740/badifinolage.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/1/0438/2559/4530/files/93308059463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4163/5997/files/30439349652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3009/1688/files/sample_resume_for_assistant_professor_fresher.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8406/2626/files/adjetivos_en_ingls.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2805/4169/files/situmusene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0976/8600/files/mapominerunasoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/43366651524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/24191286318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87463685859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9014/0583/files/56269075777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7134/0698/files/dutotagadufuwixagimasiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5787/2033/files/kuxesafetozekiteme.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 7

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_off00005ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA3 5460 bytes
SHA-256: 694fe9fb1b7e0919a8dea1818de77bdece674d9847c3ac87189081fa094aa213
font_01_sfnt_off00006e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3C 10616 bytes
SHA-256: d2102c532b2e34bff1c78f4a2c6af34b1f596b0fbb86a20ac7b99506c8e43f27

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