Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7210cbae78b2e9f…

MALICIOUS

PDF

49.1 KB Created: 2020-08-24 00:39:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a6b012455a81388b9be9dd1a07440d09 SHA-1: 621d3ef4bb456413544fdb87dd47ca656e4b2160 SHA-256: c7210cbae78b2e9fbc032154cd1540c033e4ac23722e8b750f6315e8975f5bf2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious redirector links and an SEO link farm, suggesting a phishing or malware distribution attempt. The embedded URL 'https://ttraff.cc/pify?keyword=frozen+shoulder+pdf' is a critical finding, pointing to a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect the user to a malicious site.

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=frozen+shoulder+pdf In PDF document text
    • http://mukor.cogophempstead.org/uploads/1/3/0/7/130738837/renowibivarozut-tifupalen-dipunase.pdfIn PDF document text
    • http://files.la-fll.org/uploads/1/3/0/9/130968935/2817256.pdfIn PDF document text
    • http://files.alanbirtwistle.com/uploads/1/3/1/3/131383664/werox_xapedewero_bemidituziv_zurer.pdfIn PDF document text
    • http://files.tedwilliamsiii.com/uploads/1/3/1/4/131438046/b4a37dd5b162f6e.pdfIn PDF document text
    • http://files.passionfordiscipleship.com/uploads/1/3/2/6/132681153/72b7f87318.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/1/0449/6962/3711/files/popekuvidaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5757/7122/files/journal_marketing_research_articles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/8476/3556/files/que_significa_languidece_segun_la_biblia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/sexurepabapisadosegovader.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7736/1813/files/wagiforozajikov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3423/7333/files/20519128773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/you_can_win_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/lajodewufukewibiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7827/0628/files/vetokabebedinuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9105/8076/files/tratamiento_de_rinosinusitis_cronica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8325/9285/files/all_chemistry_formulas_for_class_11_and_12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0631/1070/files/vadimimirumuzivariju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/2500/6491/files/best_free_compass_app_for_android_phone.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BB 4924 bytes
SHA-256: 57224b0008e8d9e348f4c921ef6d31db10d3f0ed580e9986dce8aa411ed5e898
font_01_sfnt_off00009478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9478 10136 bytes
SHA-256: 966c5d5e46b32951c8755e7cc833b008c8e1aaf2890877ec3133cd61a3647689