Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e4173a1b788e20…

MALICIOUS

PDF

40.6 KB Created: 2020-08-30 00:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b030c99f13c23e26f00faf26519d038 SHA-1: b279b52c02c3fbe4ea894167089213300c3c1033 SHA-256: d3e4173a1b788e20eea906b8989bdbaee31338fa6993c93675bf81feb9ab3fb2
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=myriam+nemirovsky+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the first identified as 'https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96704933611.pdf'. These findings suggest the document's primary purpose is to lure users to malicious infrastructure.

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.cc/wix?keyword=myriam+nemirovsky+pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96704933611.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/bapozu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6458/1525/files/mathematics_project_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5548/0981/files/gafijifipez.pdf
    • https://static.usrfiles.com/ugd/1cfe37_64ba484f8f694ac3a3df3525d92b699e.pdf
    • https://static.usrfiles.com/ugd/fa6f14_5254491584bb42c4a893c67d55fc899c.pdf
    • https://static.usrfiles.com/ugd/5926b4_c430a1b0f7164d32954572c8f37ddea5.pdf
    • https://static.usrfiles.com/ugd/12745a_41282bf3951543a2ab8ff70ac31fedfb.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b8d4db34fb94d73a78dfc389e551d89.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/tipos_de_materiales_compuestos.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3770/files/24364097795.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/apa_format_paper_outline_template.pdf
    • https://cdn.shopify.com/s/files/1/0436/2466/1154/files/xudulujoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7297/0133/files/lastpass_equivalent_domains.pdf
    • https://cdn.shopify.com/s/files/1/0432/9462/1862/files/borasadob.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/pekotumigisopokopufered.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/74319889230.pdf
    • https://cdn.shopify.com/s/files/1/0431/6479/5044/files/new_ielts_listening_answer_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4577/files/gukisanewuj.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_off00006167.bin
fda775abb8955446922038913b7e6aab3049335a7db8228c931dd14b80426534
pdf-font-stream PDF embedded font (sfnt) at offset 0x6167 5388 bytes
font_01_sfnt_off000073b4.bin
a5165f85bdc3ba5aec84cb3761c829efbd9f291a83f97b9569a40609ab08ddc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x73B4 9852 bytes