Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc91f65d55602819…

MALICIOUS

PDF

42.9 KB Created: 2020-08-20 00:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c6f3386156ced13a27688ee50f7022ea SHA-1: 556246a6806136e748a130852e7ff5a4b5186743 SHA-256: cc91f65d55602819d9e7d47558473c14a3eaea288bfe7f5c1670b0702e5f1d86
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a significant number of embedded links. One critical heuristic identified a link to known malicious redirector infrastructure, and another identified a PDF link farm. The document body contains obfuscated text and the primary malicious URL, suggesting the document's purpose is to lure users to 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.ru/pify?keyword=gelatin+sheets+vs+powder In PDF document text
    • http://lokufes.camptesahe.com/uploads/1/3/1/6/131606218/1012421.pdfIn PDF document text
    • http://files.rockyview.studio/uploads/1/3/2/7/132740270/7051987.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/1/0437/3177/9733/files/54791599989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43396058945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0331/3315/files/fovidisusogejawegevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7853/2758/files/human_body_parts_name_with_picture_in_gujarati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9621/5456/files/maroon_5_animals_mp3_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6522/1028/files/vadakus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/sebitugizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7182/2232/files/dokutipozuliviniw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/ts_marriage_certificate_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/4429/5076/files/equation_of_a_circle_word_problems_with_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/c_alias_template_function.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/redukenedobitaguwowok.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 2

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_off000069c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69C3 5228 bytes
SHA-256: 760fa3176bb943228e0e05945d76b9c0c86eafb68c05acd9e01b5d071523c953
font_01_sfnt_off00007b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9B 10584 bytes
SHA-256: c1f1c7491fcd87c0ca073e55eb41c5e6f4ce6110f4f0102b98a13b00abef75b0

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