Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c320ab7ed72dbb7…

MALICIOUS

PDF

34.8 KB Created: 2020-08-12 07:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c188df791b1b803bda1a3a4b35f6de3a SHA-1: b7cd8f6d7f30237ea31b05369f48fb5f4445e8b1 SHA-256: 4c320ab7ed72dbb724e8c927275d298209d42757a7be18edacfdc7943ea52f43
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links, many of which lead to external PDF files. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=soccer+referee+score+sheet+pdf'. The document body contains garbled text but includes the same malicious redirector URL and several other PDF links, suggesting a lure or redirection mechanism. No scripts were extracted from this sample.

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=soccer+referee+score+sheet+pdf In PDF document text
    • http://files.lawrencedavidlegal.com/uploads/1/3/0/9/130968993/dofujanizimor.pdfIn PDF document text
    • http://zabapejal.bostoneverafter.com/uploads/1/3/1/4/131453540/056e208151d.pdfIn PDF document text
    • http://files.mixedattainmentmaths.com/uploads/1/3/1/6/131606121/80928375a7.pdfIn PDF document text
    • http://laxusidag.whitestole.com/uploads/1/3/1/4/131406686/fiketupoketuxogoxo.pdfIn PDF document text
    • http://files.tellyourstory.today/uploads/1/3/1/4/131452988/1012165.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/1/0430/9159/1317/files/8846691979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2651/3048/files/vigupovalamoweluvemoxixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/contra_o_arminianismo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7667/3946/files/62328266563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8076/9951/files/pdf_annotator_mac_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0183/9775/files/33402929818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3017/4101/files/61127882379.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3827/6760/files/radiation_biophysics_edward_l_alpen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3969/2699/files/xituz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7808/0925/files/typing_com_bot.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_off000048eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48EB 5104 bytes
SHA-256: db00bf7618545fc64307176cc1464a2aa60551db4bb699c1d277e7e262adacae
font_01_sfnt_off00005a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A33 10236 bytes
SHA-256: 5b0546705d5411a5a31025abeb724a59afa80a81694d1a19e20cb2830994bb7a

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