Malicious PDF — malware analysis report

Static analysis result for SHA-256 20c1f24095a4a284…

MALICIOUS

PDF

47.4 KB Created: 2020-08-11 19:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 678beac1823c8405588d2e7e6c0d6864 SHA-1: e1556206ac8f9bdbf491c9626c6a249c34938ec1 SHA-256: 20c1f24095a4a284f54a552a077daed3bd7aa2b84a20ce9decb6b115048c57a3
128 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its use of a link farm containing numerous external PDF links, many of which point to potentially malicious redirectors. The primary malicious URL identified is https://ttraff.ru/pify?keyword=icse+2020+syllabus+pdf. The document body contains garbled text but also includes the suspicious URL, suggesting an attempt to lure users into clicking malicious links under the guise of providing syllabus information.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=icse+2020+syllabus+pdf
    • http://files.showstoppersshowchoircamp.com/uploads/1/3/0/8/130814687/xowabixuluw.pdf
    • http://files.arctictreasures.shop/uploads/1/3/1/4/131406082/eb7cfa91000.pdf
    • http://files.submissiontosource.com/uploads/1/3/0/9/130969791/6c6fad3a6.pdf
    • https://cdn.shopify.com/s/files/1/0437/1791/8875/files/netherlands_railway_map.pdf
    • https://cdn.shopify.com/s/files/1/0434/3287/0037/files/21538293842.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/foworutuxuzimo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9577/5650/files/peter_kreeft_handbook_of_christian_apologetics.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6150/files/troll_romance_quick_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/2155/8183/files/bash_do_while.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4241/files/snapper_self_propelled_lawn_mower.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0428/2023/9519/files/jozojejanategi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9740/7126/files/50938840955.pdf
    • https://cdn.shopify.com/s/files/1/0433/7896/6691/files/99141414990.pdf
    • https://cdn.shopify.com/s/files/1/0438/9565/2504/files/43173867438.pdf
    • https://cdn.shopify.com/s/files/1/0439/0735/0696/files/pugujo.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_off00007a9d.bin
e207d5106fd374b1670843371948854e7c12a9e8747f2ebf0c35151751abf6e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9D 5504 bytes
font_01_sfnt_off00008d5c.bin
6617748672b244e7ed3406e839720d68c44a3bf259af4bab27312be61f815957
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5C 10420 bytes