Malicious PDF — malware analysis report

Static analysis result for SHA-256 3880f636c1c21bff…

MALICIOUS

PDF

40.7 KB Created: 2020-08-19 21:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c9148887e8e14b35325242c970e6654 SHA-1: e306211c27fe13021853292e33a3357f965f567d SHA-256: 3880f636c1c21bfff73b6af7c508220e94914460ec46a80ef675b52531714bcd
160 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to benign Shopify URLs but one critical link to a known malicious redirector. The document body and heuristics indicate a social engineering lure, prompting the user to install a browser extension or update. This likely leads to the user being redirected to malicious infrastructure via the `ttraff.cc` domain to download further malware or engage in credential theft.

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/pify?keyword=chrome+bookmark+backup+android
    • http://kivofavaj.heathershuker.com/uploads/1/3/1/4/131406269/06eb8baf.pdf
    • http://files.jessicatcohen.com/uploads/1/3/1/1/131163976/8192298.pdf
    • http://sitit.michalsophia.com/uploads/1/3/1/4/131438392/rumozasomifaj_bezumorunigo.pdf
    • http://files.melissa-haskin.com/uploads/1/3/1/3/131382590/457807e2c7c.pdf
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/bobcat_t450_specs.pdf
    • https://cdn.shopify.com/s/files/1/0434/6334/4294/files/gre_math_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/5581/6599/files/wewiguw.pdf
    • https://cdn.shopify.com/s/files/1/0437/3243/5093/files/29858219524.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6534/files/bangalore_university_bcom_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/7827/1641/files/bimipararodafepakeden.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2859/files/fikomamudig.pdf
    • https://cdn.shopify.com/s/files/1/0435/4647/6708/files/kolezemofuto.pdf
    • https://cdn.shopify.com/s/files/1/0437/1913/1285/files/cae_practice_tests_1.pdf
    • https://cdn.shopify.com/s/files/1/0435/2537/4103/files/likevizo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7052/9436/files/pibosuzuwegov.pdf
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/50780674158.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_off000062b2.bin
21b58fe97038e4235f7e9ff48902d6899ef431d06241b4d2531d297b2214480d
pdf-font-stream PDF embedded font (sfnt) at offset 0x62B2 5212 bytes
font_01_sfnt_off0000743c.bin
e73e14e50444d3f5644df65c640aef3447a61e45efe8d53920d9700c64bf00c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x743C 9876 bytes