Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5c12b2af8a183f3…

MALICIOUS

PDF

39.6 KB Created: 2020-08-23 06:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6f976132ce1c13c99ed9a5f9ca3e36f1 SHA-1: b915b4576ea3ff4e4cb7bbc4690a2099a24716d9 SHA-256: c5c12b2af8a183f3e3c7defcdaa1b79a40b09642fb9178cfcc0d0647862f729c
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=cellsentials+usana+pdf+espa%25C3%25B1ol', points to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of a link farm and a malicious redirector indicates an attempt to lead users to malicious content, likely for phishing or malware delivery.

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=cellsentials+usana+pdf+espa%25C3%25B1ol In PDF document text
    • http://files.theidealtrip.com/uploads/1/3/1/1/131164202/c79560ca13a8.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/1/0430/6737/5770/files/tuveravem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0899/1140/files/xatoralun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1838/6588/files/gewokulelerubot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2515/9576/files/vitarures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/gukojojuxavuremakaruxur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xutowoterefabobenovise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/5353/4632/files/logo_quiz_answers_level_5_logo_58.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/muzinoborutodov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/gibujiwodavalejujov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/3427/4966/files/broad_based_black_economic_empowerment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/zorowolipulu.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_off00005b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B43 5056 bytes
SHA-256: 34e0d21c5efb621ef3bb0da67ea927e703059c618156bf3e0c99b50da4bcbe6e
font_01_sfnt_off00006c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C41 10532 bytes
SHA-256: 4aeff3b5c85dab88b39b79eb28a3bae129c7c0dfe124e2e305600cbc151c1d4d

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