Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b6c879c5eb15928…

MALICIOUS

PDF

39.7 KB Created: 2020-08-25 03:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 15bd2321571ef03811dc7a6cc8b314b8 SHA-1: afd476df76f278af8c6665435260b0d57438df4c SHA-256: 5b6c879c5eb15928870a74e7c280300c6f19b7696d469ffb3bc91bd0ef446e7b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple embedded links, with a critical heuristic firing for a redirector link to 'ttraff.cc'. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicates maliciousness, and the overall pattern points to a phishing lure for free downloads, leading to malicious infrastructure.

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=advanced+grammar+in+use+with+answers In PDF document text
    • http://files.professorjedi.com/uploads/1/3/1/3/131379730/xesodexajuzenes.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/1/0431/9445/0078/files/google_wifi_router_for_dsl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/input_sensitivity_discord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5557/1353/files/getozilomuvukibebirut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3165/7621/files/gikubesetesemivazufufa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4942/6839/files/sufasevurobubeti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5365/9798/files/69829408357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/34795368841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/8137/2582/files/red_alert_gif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9930/7673/files/43126635751.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 1

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_off00005ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE7 5464 bytes
SHA-256: 210c19bbfbdb47d7b3f6ee49e31b1324d8cfa3ddb640d827208bcca5c29dc7a0
font_01_sfnt_off00007164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7164 9684 bytes
SHA-256: 3a89b95c2eda11a9bcc5bb596bba033499d179770ac6dcb388b66af93f3c3fef

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