Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cad9c640bc0a974…

MALICIOUS

PDF

46.6 KB Created: 2020-08-16 16:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b304b2d3983fc354acc2ffa7c68681a3 SHA-1: 132e37291a18b6f12950826138c959bcfaf91256 SHA-256: 9cad9c640bc0a974775f8c474facda151c7fc28139cac801d864690d42b0ef3f
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=chess+rules+in+telugu+pdf+free'. This URL is presented within the document body, suggesting a phishing or redirection attempt. The presence of numerous external PDF links, many hosted on cdn.shopify.com, indicates a link farm strategy, likely for SEO poisoning or distributing malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=chess+rules+in+telugu+pdf+free In PDF document text
    • http://files.thealpacacottage.com/uploads/1/3/0/7/130776445/9fc356bb3a8.pdfIn PDF document text
    • http://files.regalbakeryusa.com/uploads/1/3/0/8/130813992/ginavakada.pdfIn PDF document text
    • http://dutaki.words2pix.com/uploads/1/3/0/7/130776031/gawaxojoke.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/1/0434/6524/4832/files/cancer_del_cervix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8331/6891/files/western_plaguelands_flight_path_horde.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1576/5148/files/65002920503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2073/7950/files/63345635861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/52578204486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7278/1477/files/kebowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1056/3994/files/34429462459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44758106853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/47880148884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4963/8298/files/lajiforiwasupoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/clinical_examination_book_for_medical_students.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_off00007a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A15 4996 bytes
SHA-256: 7838717148184c33482b71021a8fc1f1c835ca8fd87c0a1b3c2ff9ee8628457f
font_01_sfnt_off00008b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0B 10008 bytes
SHA-256: 666f7492a8c8a79bc90f3043c551a1eb4f318dfa2272d1707684903a177661d1

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