Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca06abcfe2d0674…

MALICIOUS

PDF

47.1 KB Created: 2020-08-25 09:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a9cb85fae829c87308929c2d2160020 SHA-1: ffd27a31f7da517ee1d843e8f64fcd8da32ed145 SHA-256: cca06abcfe2d06746a4eaee2ba7da66357c38b78aae3ef9f0c43a98a0edb8ab0
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a malicious redirector link. It also contains a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.cc/pify?keyword=substitution+will+occur+font+free, which likely serves as a redirector to further 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.cc/pify?keyword=substitution+will+occur+font+free
    • http://files.samsung-repairs.us/uploads/1/3/0/7/130738710/9599854.pdf
    • http://nojexavo.monitheseries.com/uploads/1/3/1/8/131856158/318ca7.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/fomomonadugaxagiwok.pdf
    • https://cdn.shopify.com/s/files/1/0431/4896/8090/files/bofukazakozer.pdf
    • https://cdn.shopify.com/s/files/1/0429/6605/7116/files/bose_awr1-_1w_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/85475655211.pdf
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/fabekevatemi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/lower_back_pain_exercises_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0438/2982/1597/files/runa_vimochana_angaraka_stotram_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/9th_class_chemistry_notes_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9562/files/81040741000.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_off00007afb.bin
8ee7f9d023184fc901154cc4fce6dfdebc899ba4a5374b8eabb96f0aa4fa6a4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFB 5000 bytes
font_01_sfnt_off00008c17.bin
bd64c42ce55885964d51a912b6fb6d9f839e5908a8e7097ef202b00b889681e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C17 10576 bytes

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