Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab7bc403c17ca49f…

MALICIOUS

PDF

35.2 KB Created: 2020-08-13 16:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e5b83369cb1cb6b94d5476f627ebe74 SHA-1: bc495bab77f659a5308d16dd2206cb624ebef7bf SHA-256: ab7bc403c17ca49f3d1cef6ddf86555f7b2d531e03fc0688a4e7353e158c4b87
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and a lure related to a 'Pearson 6th grade math book pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting.

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.ru/pify?keyword=pearson+6th+grade+math+book+pdf In PDF document text
    • http://xutava.studytospeak.com/uploads/1/3/1/3/131383332/nowujejuzabogi-milaketa.pdfIn PDF document text
    • http://gepawom.taichifuture.com/uploads/1/3/1/0/131070702/9114383.pdfIn PDF document text
    • http://files.mkoshka.com/uploads/1/3/1/4/131413678/ziwob-gamujifewik-mavurijuz-xufur.pdfIn PDF document text
    • http://files.art63lynch.com/uploads/1/3/1/4/131484133/f06d797089.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/1/0431/0673/0138/files/39775096174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6823/5675/files/teaching_approaches_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4666/6389/files/codex_calixtinus_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1581/3795/files/54872820844.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0522/2822/files/wodedezeto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5198/0712/files/dazinizojamadit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/ferufewunabix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4796/0232/files/bankart_repair_protocol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6172/7647/files/formato_certificado_medico_escolar_dela_sep_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/cambridge_ket_test_papers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4665/8463/files/zivijoseloxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/0631/5931/files/slavery_by_another_name_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0337/7824/files/between_and_among_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/dupanudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4031/7350/files/pseudo_dionysius_mystical_theology.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_off000047fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47FA 5784 bytes
SHA-256: 9d302aff33da96bb59fcc6a0b670c8b1335cc3f60cfae2f534ca1233f3a27a5c
font_01_sfnt_off00005b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B77 10172 bytes
SHA-256: 42a89cbe78df38cc8e24a6b7872e415034da2a4d5e672d3a3600712c792eca65