Malicious PDF — malware analysis report

Static analysis result for SHA-256 524c357e23d0cc6e…

MALICIOUS

PDF

45.0 KB Created: 2020-07-30 11:02:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7c4484352707e701a8e9c84777404823 SHA-1: 8293b46c0030f45360462b397a0c1b1283afa617 SHA-256: 524c357e23d0cc6e6078c3211b2554cbe82eb83797b6cd779155351823f3d5b6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO manipulation. The primary malicious URL, 'https://ttraff.cc/pify?keyword=ielts+assessment+criteria+pdf', is a known malicious redirector. The document body is heavily obfuscated, preventing a clear understanding of its specific content beyond the metadata indicating it's related to IELTS assessment criteria. No scripts were extracted from this sample.

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=ielts+assessment+criteria+pdf In PDF document text
    • http://files.prometheanrebellion.com/uploads/1/3/1/4/131406275/7771441.pdfIn PDF document text
    • http://files.summitventure.co/uploads/1/3/0/7/130739076/wewejufelinujij.pdfIn PDF document text
    • http://files.royaleliterental.com/uploads/1/3/1/3/131398099/881656203dbd53.pdfIn PDF document text
    • http://files.phdimensions.com/uploads/1/3/1/4/131454316/wopatesosarikuviko.pdfIn PDF document text
    • http://files.mistywick.net/uploads/1/3/0/7/130776265/9acf3c.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/1/0440/4926/8886/files/40547243853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3396/8287/files/53495345493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/mixatubise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/ladaraxawilom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9232/8104/files/73882148871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3526/3130/files/movivurikuwobusokaxirijuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/rikofoxarariviwajasugizer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/11030136506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/36532376446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6365/7119/files/56967461540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/peboginesewuxexadamo.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 5

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_off00007489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7489 4916 bytes
SHA-256: d44cfdfdb88ed6d006fce8a717cc68693e4a02c633af2ed782778494b263e270
font_01_sfnt_off00008513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8513 9780 bytes
SHA-256: 9d54497c327663bfe201aae33b877b51347c217393676670545c76a8bac61f27

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