Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ce1bdfcb74b927…

MALICIOUS

PDF

44.1 KB Created: 2020-09-01 02:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 482a67e21230b15044227406c4d2fb19 SHA-1: ea19a724bb61f7d368b7ffe9915bad0d767f82a9 SHA-256: 22ce1bdfcb74b92743884517a137ae4ef74a23fca759e00204a5e98f129cf0af
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a PDF link farm. One of the primary URLs, https://ttraff.ru/wix?keyword=formal+assessments+in+education, is flagged as a malicious redirector. While many other embedded URLs point to benign content, the presence of the malicious redirector and the sheer volume of links suggest a malicious intent, possibly for SEO abuse or to distribute further malicious content.

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/wix?keyword=formal+assessments+in+education
    • https://static.usrfiles.com/ugd/b8c837_d2ed47b51d8f4aab89b7306997f4a98c.pdf
    • https://static.usrfiles.com/ugd/7041e4_432e09b3999d44fd93157da31f33840d.pdf
    • https://static.usrfiles.com/ugd/a382ee_79e78b682d40418eb1ab53b8cdd269df.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/jquery_change_color.pdf
    • https://cdn.shopify.com/s/files/1/0439/5171/8558/files/tugaforedijajesaregozux.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3336/files/gigite.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/lewugoritowopasekijakasen.pdf
    • https://cdn.shopify.com/s/files/1/0436/0939/1261/files/79689522853.pdf
    • https://cdn.shopify.com/s/files/1/0433/8148/9813/files/fesukome.pdf
    • https://cdn.shopify.com/s/files/1/0428/7699/3702/files/english_to_spanish_translation_free_application.pdf
    • https://cdn.shopify.com/s/files/1/0435/3739/9960/files/loxejebidiwoniv.pdf
    • https://cdn.shopify.com/s/files/1/0434/6567/0806/files/1880254181.pdf
    • https://cdn.shopify.com/s/files/1/0431/8131/0114/files/mugelukopuraweg.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12410546401.pdf
    • https://cdn.shopify.com/s/files/1/0443/3759/4524/files/best_reader_for_reading_ebooks.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_off00006e2d.bin
f5d1e34d526bd9fe81b6e3783682d1f45423deac3cd9a7e59b66e812251d65a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2D 5040 bytes
font_01_sfnt_off00007f32.bin
f4bc1ff3710f40a13a63cc238c5f41b7eae8b9a8e8e10e6174e64a9f7671285d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F32 10540 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.