Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd95ac308706a5d9…

MALICIOUS

PDF

50.4 KB Created: 2020-08-18 20:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67ef8892f4cab88a4787652c05ac67b7 SHA-1: d0b33d9fb52c53a34a15932911d3ab6a5aa3a60d SHA-256: dd95ac308706a5d9449ddcf0a65be99ade6bc0943eb598e8ec5c1243b1729a0c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=cheat+sheet+for+statistics+exam', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a link farm or redirection tactic to lead users to malicious content. No scripts were extracted from this sample.

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=cheat+sheet+for+statistics+exam
    • http://sosiriraw.depictformat.com/uploads/1/3/2/7/132740285/8572361.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/1035256101.pdf
    • https://cdn.shopify.com/s/files/1/0432/1280/0159/files/amoxicilina_bula_profissional.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/active_and_passive_voice_formula_for_all_tenses.pdf
    • https://cdn.shopify.com/s/files/1/0431/8897/7813/files/el_alquimista_impaciente.pdf
    • https://cdn.shopify.com/s/files/1/0430/9634/2695/files/suzigodufikamupifeli.pdf
    • https://cdn.shopify.com/s/files/1/0431/0292/9047/files/zajataseruralukigila.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1365/files/git_remove_upstream_branch.pdf
    • https://cdn.shopify.com/s/files/1/0430/5672/6165/files/xejesenuvalubamajiveg.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5290/files/alcoholics_anonymous_big_book_fourth_edition.pdf
    • https://cdn.shopify.com/s/files/1/0452/3776/4256/files/biological_width_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2089/files/roman_to_integer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61066914906.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e18.bin
a8441b866683e2d36b7b481af54104e8488169f7c2b5a1e34a997a3592cdceb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E18 5060 bytes
font_01_sfnt_off00006f21.bin
b06f2aad10479c093bcd8c21c561142f54c6519d884f12d7c7c6ac171594c741
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F21 3508 bytes
font_02_sfnt_off00007d04.bin
00a87f18a1dcd6ba09b54f344067bc28056520b768a02e1a54813fed0d6a8309
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D04 10736 bytes
font_03_sfnt_off0000a131.bin
66d89d1d5c3fdb96b76572d576c101084018821613d03939e85baefad34b47c4
pdf-font-stream PDF embedded font (sfnt) at offset 0xA131 17876 bytes