Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef9d2334bea7f16…

MALICIOUS

PDF

39.9 KB Created: 2020-08-12 05:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e24403335fde6d9be652bd141733163 SHA-1: 8c9170b0afac2500667c9287b91a515fc4b774f1 SHA-256: bef9d2334bea7f1670623787c2d3fd821bcacd5d106e6af6da32d874aa434ae7
120 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 a link farm hosted on Shopify. One of these links, https://ttraff.ru/pify?keyword=augusto+cury+gest%25C3%25A3o+da+emo%25C3%25A7%25C3%25A3o+em+pdf, is identified as a malicious redirector. The document body, though partially corrupted, appears to be a lure related to 'Augusto Cury gestão da emoção em pdf'. The primary attack pattern involves directing users to malicious infrastructure through a deceptive link farm.

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=augusto+cury+gest%25C3%25A3o+da+emo%25C3%25A7%25C3%25A3o+em+pdf
    • http://files.nefertariliving.org/uploads/1/3/2/7/132712268/147264.pdf
    • http://files.award-tutoring.com/uploads/1/3/1/0/131070045/pegiwawowazezig.pdf
    • http://fabuku.navigatethepath.com/uploads/1/3/1/4/131482995/00c257112389d.pdf
    • http://files.larisamantordressage.com/uploads/1/3/2/8/132815207/464316.pdf
    • https://cdn.shopify.com/s/files/1/0435/7118/3777/files/boxapaneterup.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/wolanega.pdf
    • https://cdn.shopify.com/s/files/1/0438/9715/9832/files/wawujafezavefezatuzu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/advanced_placement_economics_teacher_resource_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5239/files/business_communication_writing_skills.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/xitowupojevi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zadolodiwifunum.pdf
    • https://cdn.shopify.com/s/files/1/0436/6581/7753/files/ranesezetezufakewadi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1864/8732/files/45146892295.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/51649041194.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7451/files/48478012079.pdf
    • https://cdn.shopify.com/s/files/1/0432/3452/5347/files/kibudawekuvuvotek.pdf
    • https://cdn.shopify.com/s/files/1/0438/3129/6160/files/pewovekinafud.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_off000057b5.bin
cc7f878a176554cc6e0366d9708f52e1b2645782a1d51571f6e3dde95b14ef78
pdf-font-stream PDF embedded font (sfnt) at offset 0x57B5 6036 bytes
font_01_sfnt_off00006b56.bin
454ed6f0795e2ca65d3201c81a2fb642c590ac9d0244cb400616204891f44f2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B56 12328 bytes