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)
MD5: 4e5b83369cb1cb6b94d5476f627ebe74 SHA-1: bc495bab77f659a5308d16dd2206cb624ebef7bf SHA-256: ab7bc403c17ca49f3d1cef6ddf86555f7b2d531e03fc0688a4e7353e158c4b87
120 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.

Heuristics 3

  • 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.
  • 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
    • http://xutava.studytospeak.com/uploads/1/3/1/3/131383332/nowujejuzabogi-milaketa.pdf
    • http://gepawom.taichifuture.com/uploads/1/3/1/0/131070702/9114383.pdf
    • http://files.mkoshka.com/uploads/1/3/1/4/131413678/ziwob-gamujifewik-mavurijuz-xufur.pdf
    • http://files.art63lynch.com/uploads/1/3/1/4/131484133/f06d797089.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/39775096174.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5675/files/teaching_approaches_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/4666/6389/files/codex_calixtinus_music.pdf
    • https://cdn.shopify.com/s/files/1/0436/1581/3795/files/54872820844.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2822/files/wodedezeto.pdf
    • https://cdn.shopify.com/s/files/1/0439/5198/0712/files/dazinizojamadit.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/ferufewunabix.pdf
    • https://cdn.shopify.com/s/files/1/0432/4796/0232/files/bankart_repair_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0445/6172/7647/files/formato_certificado_medico_escolar_dela_sep_2020.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/cambridge_ket_test_papers.pdf
    • https://cdn.shopify.com/s/files/1/0429/4665/8463/files/zivijoseloxe.pdf
    • https://cdn.shopify.com/s/files/1/0449/0631/5931/files/slavery_by_another_name_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/0337/7824/files/between_and_among_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/dupanudo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4031/7350/files/pseudo_dionysius_mystical_theology.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047fa.bin
9d302aff33da96bb59fcc6a0b670c8b1335cc3f60cfae2f534ca1233f3a27a5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x47FA 5784 bytes
font_01_sfnt_off00005b77.bin
42a89cbe78df38cc8e24a6b7872e415034da2a4d5e672d3a3600712c792eca65
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B77 10172 bytes