Malicious PDF — malware analysis report

Static analysis result for SHA-256 723e5b86eea59e13…

MALICIOUS

PDF

42.3 KB Created: 2020-08-09 22:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3187ba48bb484a51550d4768faf320b9 SHA-1: d74a669f27e22a2ee924d5b620062d9fdb532b18 SHA-256: 723e5b86eea59e1377711b3a376aaffcd8fd978b2e22ab7ded65fe47cfbbfd49
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to a malicious domain, disguised as a worksheet answer key. This is a common lure for phishing or malware distribution. The presence of multiple Shopify links, some benign and some unknown, suggests an attempt to blend malicious content with legitimate-looking resources. The ML classifier strongly indicates malicious intent.

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=covalent+bonding+lewis+dot+structures+worksheet+answers+pdf In PDF document text
    • http://files.cornerstoneteen.org/uploads/1/3/1/6/131636914/dolaxilo.pdfIn PDF document text
    • http://files.wyatttietzfoundation.com/uploads/1/3/1/3/131383318/tupezeguxo.pdfIn PDF document text
    • http://files.diasandbias.com/uploads/1/3/1/4/131412032/xasafosifetas.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/1/0436/2626/6782/files/arc_tennis_elbow_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jatud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9690/7678/files/opera_hotel_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9354/8444/files/negimijidirubodal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/81210048223.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/xoxikizevifijazebopebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4044/0471/files/43612045397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6251/8182/files/23111353435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3886/6597/files/2100624575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6434/5247/files/42942789596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6281/9990/files/clicker_keypad_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0930/9848/files/jufezid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3495/0304/files/widewoxijudefozenunov.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 3

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_off0000656d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x656D 5676 bytes
SHA-256: 2d005da6d730950aea9d08188218d5fd12ae1d174c9f32aacd0cf4f81bff3783
font_01_sfnt_off000078c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C5 10180 bytes
SHA-256: fb4ad0aaa9d18b0816ca7d40cbd2e24298f4bb7a46025ede80a7dc2dffa132ac

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