Malicious PDF — malware analysis report

Static analysis result for SHA-256 af76c7d7cb623b1e…

MALICIOUS

PDF

40.6 KB Created: 2020-08-11 05:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6baeffa14c93b81442738457d70e4031 SHA-1: 1d26a9a18722b4228c78af30f7b292a6331aef48 SHA-256: af76c7d7cb623b1e6a73162fca0f886e361f2f2f6dbb13ec86191b1f503dd723
194 Risk Score

Malware Insights

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

The PDF file contains a link farm and a direct link to a known malicious redirector, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. No scripts were extracted, but the presence of multiple PDF links points to a strategy of overwhelming the user with content, likely to obscure the malicious destination.

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.ru/wb?keyword=ap%20chemistry%20acid%20base%20reactions%20worksheet%20answers In PDF document text
    • http://files.mballew.com/uploads/1/3/0/7/130738741/842213fd1b.pdfIn PDF document text
    • http://files.thesexminister.com/uploads/1/3/1/3/131381802/tupobazisegawoge.pdfIn PDF document text
    • http://files.whistlingfrogresort.com/uploads/1/3/2/6/132681002/masaberilanimubaloji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/28995301168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6054/3138/files/22867149947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5053/2001/files/jalulonubapedovonos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4184/8470/files/chronicles_of_ancient_darkness_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3256/4132/files/ghana_banking_act_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3644/1767/files/bachianas_brasileiras_no_5_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3791/7333/files/kejipeledojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3502/3770/files/foxit_editor_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0367/4785/files/fifoputalizilanudogu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5342 5456 bytes
SHA-256: 805224f4e38a86e681551369f7d8ffb27cd7e659f0f5e3dec16c84ff7ffe11eb
font_01_sfnt_off000065a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A9 9892 bytes
SHA-256: b67381cfadfa75684687a7aa1e4d1b47cdfad8dac73b7df82372461e91b8e392
font_02_sfnt_off00008786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8786 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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