Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6b164542580f6d…

MALICIOUS

PDF

40.1 KB Created: 2020-08-25 03:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5cecc88c9a8194a19f58fe4e9dc016e8 SHA-1: 943a385812118b2a2b325e3e084b134dbd41d7dc SHA-256: cc6b164542580f6d19afd14e03189d961a127e866312cdde188683a9038f228d
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'class 11 biology textbook pdf' and the malicious URL, suggesting a lure to download potentially harmful content. The primary malicious URL is https://ttraff.cc/pify?keyword=class+11+biology+textbook+pdf, which is likely used to redirect users to further malicious sites.

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=class+11+biology+textbook+pdf In PDF document text
    • http://jikon.behinddallas.com/uploads/1/3/2/3/132303301/benekubizi-wuderixuvut.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/1/0433/6936/5654/files/92003074217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1660/1249/files/lukez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4126/5566/files/good_cv_template_word.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0058/5632/files/natamujitizanafagujuwomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0456/8793/1039/files/majevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8634/6408/files/91785316360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dedijadexurusefux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7333/0593/files/que_es_el_contexto_situacional.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/kotewisadaparoguvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9489/1943/files/adoption_paternity_leave_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dusegu.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_off00005eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEF 5444 bytes
SHA-256: a0645273c3972750b1d1a26afa62b3dc45e2b9ad0b77f50ff9c505004767585b
font_01_sfnt_off00007196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7196 9980 bytes
SHA-256: 8965bc0bcf931e6461bee45331773a257fd2a5bcf2dc4d9064e72fe29d87a111

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