Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66626f1d34548c8…

MALICIOUS

PDF

49.8 KB Created: 2020-08-19 15:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2b6c2d15bd4a6ade9e8258be302fdb16 SHA-1: 5ca8ecdee6945b33cbc38a7f76edb337864adc00 SHA-256: f66626f1d34548c8592083ee0eb343627bccc5c4366e7426dfa568d2e665b23f
202 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=net+exam+mcq+questions+with+answers'. This suggests a phishing or scam attempt, likely to lead the user to a malicious site. The presence of a visual download button further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=net+exam+mcq+questions+with+answers In PDF document text
    • http://files.aliceannephotography.com/uploads/1/3/1/3/131379447/xisejexopore.pdfIn PDF document text
    • http://xopomut.sushi-logos.com/uploads/1/3/1/3/131380600/6286603.pdfIn PDF document text
    • http://files.kcpanhel.com/uploads/1/3/2/8/132815961/1055807.pdfIn PDF document text
    • http://vonafuw.juneberrycottage.com/uploads/1/3/2/6/132682883/penedepurupubosiwut.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/1/0432/7315/8806/files/16072423357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6972/5085/files/structural_building_components.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/3974461122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gowaluzefep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1699/3440/files/formal_dress_for_wedding_reception.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6756/8291/files/2013_honda_accord_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5294/7863/files/50928817094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6890/6906/files/98939001414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2347/4583/files/brush_lettering_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/500534398.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_off000084e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E5 5260 bytes
SHA-256: e65f4016d5a5479d18c6e23dce8a5858b9f71e0a85808406179fba92ba175c7d
font_01_sfnt_off000096ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96BA 10376 bytes
SHA-256: 62072415b1e260288de5773c106a4fa7b3861b3cb522d8f6603d2be74e1f50f9

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