Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ea75f65665aeb81…

MALICIOUS

PDF

42.7 KB Created: 2020-08-15 02:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7fd12b605d7118c524b1c3e49972be42 SHA-1: c56beb9cac66a8358c1cb6d345a8f9bb8b66f7e1 SHA-256: 3ea75f65665aeb8166a9cd82144a43db5a7ab4197713800264927a247f982b2f
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. The document body and embedded links suggest a lure to academic or software-related content, likely to deceive users into clicking on malicious URLs. The primary malicious URL identified is ttraff.com, which is flagged as a redirector.

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.com/pify?keyword=b+arch+thesis+projects+pdf In PDF document text
    • http://files.thecosmicbrain.net/uploads/1/3/1/4/131453022/bejapatilij.pdfIn PDF document text
    • http://files.sacpdm9.com/uploads/1/3/1/6/131606368/berujogabod.pdfIn PDF document text
    • http://files.djindyproductions.com/uploads/1/3/0/9/130969576/weful.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/1/0433/1234/9334/files/cinebench_r15_maxon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4437/1613/files/78139628122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/65790967126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/nikolai_ostrovsky_how_the_steel_was_tempered.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4324/8533/files/nowoczesny_audyt_wewntrzny_chomikuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/ed_sheeran_deluxe_edition_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3507/3440/files/82943081974.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_off00006991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6991 5336 bytes
SHA-256: 9b30fa6a10741237f7f07ee8fab20a6d4b0477645641c741aec752b55246367b
font_01_sfnt_off00007bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB1 10288 bytes
SHA-256: 606c2097a4e5cba20d719dccb28851ee530dcfbceb9a72123258c425a0daa16e

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