Malicious PDF — malware analysis report

Static analysis result for SHA-256 4642b946b10c0139…

MALICIOUS

PDF

43.6 KB Created: 2020-08-16 18:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 85e5686b05a34364a1b76712a478ed4b SHA-1: ded1e2077d8f65c8feb6f454215c92ad232a24e3 SHA-256: 4642b946b10c01395af56a33057ebcd5928680dd0fdad7d0e3a376905c5f2191
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=clustered+index+seek+improve+performance'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which host PDF files. The document body, though heavily obfuscated, also contains the same redirector URL and several Shopify-hosted PDF links. This suggests a campaign to distribute malicious content or phish users by leveraging SEO-optimized PDF documents and redirector services.

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=clustered+index+seek+improve+performance In PDF document text
    • http://files.hkcofc.com/uploads/1/3/2/6/132683111/lobojevaresale_jojolurirukekof_nunaduwarutare_rulilik.pdfIn PDF document text
    • http://files.duncanleighclassicalguitar.co.uk/uploads/1/3/0/9/130969572/41a0b4e29.pdfIn PDF document text
    • http://files.discreetlyarmed.com/uploads/1/3/2/7/132710782/af31c.pdfIn PDF document text
    • http://files.pacificcattle.com/uploads/1/3/1/4/131453061/8880591.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/1/0430/6193/6290/files/fadefepowegerulonubex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/29416818011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3080/4637/files/rupinder_gandhi_film_ke_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8664/2336/files/fijarugigewafexemix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2725/0848/files/zaxurak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5699/6247/files/analysis_of_algorithm_lecture_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9019/0248/files/53945738182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8941/2767/files/87063674871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0731/7912/files/vbspu_time_table_2020_ma.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_off00006a07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A07 5396 bytes
SHA-256: 2b43b49e37512741c9cd177fbd7fc5e25a00c645f5d08ce941629b4a3bf77b58
font_01_sfnt_off00007c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4D 11080 bytes
SHA-256: 8cd1567743d7f31847e6a135d88e282de3fa6581d1d55f6dd53609e8a0e2d804

Open this report in the interactive analyzer, or submit your own file for analysis.