Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d3b65cbb3455426…

MALICIOUS

PDF

39.3 KB Created: 2020-09-17 19:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d59aa824f64b92fc87350a81e59ebba0 SHA-1: 5c136f94dcf91d47d8ce93b8fa118fe9d2a44bde SHA-256: 7d3b65cbb34554263b17981f19fe102604a0dd409d9b135e916d907a36374915
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector, which is designed to lead users to potentially harmful websites. The document body, though heavily obfuscated, contains text suggesting an attempt to disguise the malicious link as an educational resource. The presence of a malicious redirector and a link farm indicates a phishing or scam attempt.

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.me/wix?keyword=unit+4+review+cellular+energy+worksheet+answers In PDF document text
    • http://files.tutshillpreschool.org/uploads/1/3/1/0/131071056/452130.pdfIn PDF document text
    • http://rikeledav.diarysketches.com/uploads/1/3/2/7/132712109/kagikarib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aafb6cf7-3dc8-4dd0-87b1-12dac2518069.filesusr.com/ugd/c450b2_ee3f63da95e74751ae80b855e2ba72bb.pdf?index=trueIn PDF document text
    • https://84dbcac0-6473-4563-9db3-db3a1c5c49d3.filesusr.com/ugd/8e6e76_9083a64bece54f568d11154256cef340.pdf?index=trueIn PDF document text
    • https://79efc1db-54a5-479c-b269-c337ae0e349a.filesusr.com/ugd/a31856_553f0d4ba3144402b58188fee4558235.pdf?index=trueIn PDF document text
    • https://b5b83444-8cec-437e-8e0b-c6e10dab6743.filesusr.com/ugd/f08e01_bc6b79389e754df6a96ebd2411e6ba79.pdf?index=trueIn PDF document text
    • https://f02e3a86-775b-444b-aff9-8d25843daf48.filesusr.com/ugd/de60da_800f6474165a4d3e8de21a30b7de38bb.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/9073/0148/files/factors_affecting_blood_coagulation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6453/2887/files/pafagirowaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4968/0028/files/scan_barcode_android_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2080/4518/files/hindi_serial_sony.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6628/5462/files/varuvuguwobumeruzuvovagaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7474/0636/files/zexuxilagokuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6523/5866/files/bluetooth_lavalier_microphone_for_android.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 4

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_off000059bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59BF 5460 bytes
SHA-256: 21d91fb2fe1acc03dfba317b80ddc2bcd5109429836043cb12a03264eca07603
font_01_sfnt_off00006c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C73 10516 bytes
SHA-256: 9ab1fedd5f7cf82ef75ff211741ea80f1488b1bf9e20ba075ea0cdfc1aeac8c8

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