Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d5671cb78a20dd…

MALICIOUS

PDF

46.5 KB Created: 2020-08-12 19:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6af7a8f147248322b345e1759496b596 SHA-1: 55e6b73a38d685a1ea47d60c38da1e474dad2361 SHA-256: c7d5671cb78a20dd150738dba00c06d3c38e01a0996299019d3bd3992bcc1962
194 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious URL, disguised as an essay on bullying. This indicates a social engineering tactic to trick users into visiting a harmful site. The PDF also contains a large number of external links, suggesting it's part of a link farm designed to manipulate search engine results or distribute malicious content. No scripts were extracted, but the primary malicious action is the redirection via the embedded link.

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=bullying+in+schools+essay+pdf In PDF document text
    • http://files.talesbyataillesscat.com/uploads/1/3/1/0/131069899/8407331.pdfIn PDF document text
    • http://nomek.emmanuelsa.com/uploads/1/3/1/3/131378950/punuzifof.pdfIn PDF document text
    • http://xarozovik.fijileaks.com/uploads/1/3/0/8/130814328/dolulomalozulubol.pdfIn PDF document text
    • http://files.innerpiece.nl/uploads/1/3/1/4/131453540/6468fc4ee.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/1/0429/7592/0282/files/anlauttabelle_flex_und_flora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/tuxiwezisilizubexumev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6486/6469/files/xafofujidozerokemex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5108/1114/files/accretion_dilution_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/dujewizibunediru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4228/2399/files/tisakoritomoziriwulom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4294/7750/files/tusebutajisikolagisina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/91486594569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7617/2441/files/automation_testing_selenium.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0938/4343/files/7637441973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/752171969.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_off000077c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C6 5472 bytes
SHA-256: 7b910b74ed8cd032a87f329e29b8d8889217c3131f703a412d5f53eed3e19741
font_01_sfnt_off00008a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6B 10188 bytes
SHA-256: 0d2e0688119668ad8ce5ceaa5d094da834154c1ab9935d0475de18c227966b6d

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