Malicious PDF — malware analysis report

Static analysis result for SHA-256 f673205da10e310e…

MALICIOUS

PDF

37.0 KB Created: 2020-08-22 04:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 54346948a83142c347e23d9f2fa795c2 SHA-1: 989a5245306255ce800a381649d692caacd84321 SHA-256: f673205da10e310e5f8b0ce034dafd36ad595ecf694c6bb17a4583ee7cc8facb
234 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to lure users into downloading further malicious content. The document body, though heavily obfuscated, contains the target URL, suggesting a social engineering attempt to trick users into clicking the link under the guise of educational material.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=analog+and+digital+electronics+notes+pdf+vtu In PDF document text
    • http://files.singerforallseasons.com/uploads/1/3/1/4/131407877/7186860.pdfIn PDF document text
    • http://files.chalfontyogaandmeditationcenter.com/uploads/1/3/1/6/131636843/9442431.pdfIn PDF document text
    • http://files.andysidornxtlvlfit.com/uploads/1/3/0/7/130775727/kotexogififike.pdfIn PDF document text
    • http://files.sydneynewhorizons.org/uploads/1/3/2/7/132710787/lozaratorepu_tatira.pdfIn PDF document text
    • http://files.appleseedjunction.com/uploads/1/3/2/7/132740408/kasemepawuw_sefigujulozujaf_wujizovepavefi.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/1/0428/4504/4892/files/hematology_carter_center.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7367/3118/files/62168953379.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/giluwabisuwezarel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9442/4232/files/biomaterials_for_tissue_engineering_applications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/39020675306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8590/3525/files/jitojukenegosamitabuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8570/8953/files/voririsomikidak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9318/0070/files/14946329362.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_off000051f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51F7 5372 bytes
SHA-256: 0585f0ee1b8006b7efa3c76de3b053abcd096e3706a7c3ceea4ad5efe2d43e18
font_01_sfnt_off00006453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6453 10276 bytes
SHA-256: 867b47b1a582bef2a702da811d1e14bc1bb5ee37339caeb440889cd6e1935ffe

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