Malicious PDF — malware analysis report

Static analysis result for SHA-256 4123d826b3dc64c2…

MALICIOUS

PDF

47.8 KB Created: 2020-08-19 06:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0756138c470a1e5fb836ae38dd837374 SHA-1: 45ab40606d35a2bee60e8e98fb443a96bc9cb884 SHA-256: 4123d826b3dc64c2cc4fa96ac4149bed48c9a74a0abb69c22d36bca6c5a8c1b9
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains numerous embedded URLs, including a suspicious redirector URL (https://ttraff.cc/pify?keyword=guided+math+resources) and many links hosted on cdn.shopify.com, suggesting a coordinated effort to distribute malicious content through a large number of seemingly benign-looking PDF files.

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=guided+math+resources In PDF document text
    • http://kevamanew.mrshuffreadingisfun.com/uploads/1/3/1/4/131452958/luzaxoxinusa.pdfIn PDF document text
    • http://files.nsanzineza.com/uploads/1/3/2/3/132303312/sovudedu-fafepa.pdfIn PDF document text
    • http://vupiwexe.thedpgp.com/uploads/1/3/1/6/131637014/xarozujaxe_kudekopidol.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/1/0437/8198/0317/files/risenurebolikesuxerini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7807/4022/files/bizitudufozon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6452/3926/files/povupemuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2549/7239/files/cosmic_glue_strain.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4798/3006/files/15280335804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0291/2168/files/8949211094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6842/3334/files/php_explode_function.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/2549/3150/files/california_vehicle_bill_of_sale_template_fillable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5833/7694/files/connecting_words_in_english_speaking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7668/8798/files/personal_finance_5th_edition_madura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/english_alphabet_writing_in_four_lines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0149/4178/files/nuruzuzidadaxupesutujikam.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: centerpointschool.org 5 samples

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_off00007c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C46 5176 bytes
SHA-256: 1f27acce7a136c8cc79fbc241a3a6f82b3de3106a01053b39e081d3b15d24403
font_01_sfnt_off00008daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DAF 10748 bytes
SHA-256: 7ea6c5f2bac32654477181719a49b9834579e209925d2fdff3ba6a348ebba1f5

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