Malicious PDF — malware analysis report

Static analysis result for SHA-256 35520e912c6c7984…

MALICIOUS

PDF

46.0 KB Created: 2020-08-23 02:23:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c7bbaeb215f140ef161314ebc09cf062 SHA-1: 531f9207abbf96bf432d24f8eb12ee486a16b044 SHA-256: 35520e912c6c79840fd21bbe3d00be40c95c5a01d1d2c423d5ba1d0ef111bd6d
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 pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the text 'Changing between fractions decimals and percentages worksheets' and the malicious URL, suggesting a lure to educational content that redirects to a malicious site.

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=changing+between+fractions+decimals+and+percentages+worksheets In PDF document text
    • http://files.fonpape.com/uploads/1/3/1/4/131453843/4630458.pdfIn PDF document text
    • http://fetoked.bournemouthjrc.co.uk/uploads/1/3/0/7/130776031/negijofefufufikepa.pdfIn PDF document text
    • http://files.islandbeautyportland.com/uploads/1/3/0/9/130969243/522dd448b29a.pdfIn PDF document text
    • http://sedox.myslickpic.com/uploads/1/3/0/8/130874063/bepaluwumegi.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/1/0429/6704/0154/files/gawojizuwuwoserenep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5831/4912/files/33923278829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/34704216482.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8909/1998/files/speak_now_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0485/3406/files/garazabemaku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/futikuzazojexopuvenewipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/5740/2276/files/buziluve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2585/8723/files/indira_gandhi_university_date_sheet_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7313/5011/files/sivanamowanuwerug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2403/9592/files/64371151571.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 8

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_off00007363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7363 5768 bytes
SHA-256: d2202cdc93d71803574783fbdb7537d83ded77e64c4d9fb3c417806ed674baef
font_01_sfnt_off000086e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E4 10636 bytes
SHA-256: cc23e991fcf3695f5703e5272aa75acfa74cf34324e525aa2b41c99fa3bd070e

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