Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca5b662ff8db0dcd…

MALICIOUS

PDF

37.9 KB Created: 2020-09-05 13:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f84f0747204ab0d90ed99007084232b SHA-1: f5895997250e13a8f0dbbe4f91064c97f372ba45 SHA-256: ca5b662ff8db0dcd96f575b74025fbe67e79333de3bd4ff3ca32bfd6a20bf6d6
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.club/pify?keyword=master+page+template+in+asp.+net+c%2523'. This indicates a phishing or social engineering attempt to lure users to malicious content. The document also contains a large number of embedded links, many pointing to Shopify, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. No scripts were extracted, but the presence of the malicious redirector is the primary indicator of compromise.

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.club/pify?keyword=master+page+template+in+asp.+net+c%2523
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/zuforopajubulimu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6561/4234/files/77910419473.pdf
    • https://cdn.shopify.com/s/files/1/0433/5583/2469/files/secure_folder_android_7._0.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/99755301520.pdf
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/jejojeguxanapokedanotu.pdf
    • https://static.usrfiles.com/ugd/c836c3_3fd904efe54b42019348f91f15b27d1b.pdf
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/16460432806.pdf
    • https://cdn.shopify.com/s/files/1/0439/2583/1835/files/sounds_of_animals_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0454/3725/5838/files/shapes_worksheets_for_kg2.pdf
    • https://cdn.shopify.com/s/files/1/0438/8916/4440/files/my_talking_tom_cheat_ios.pdf
    • https://static.usrfiles.com/ugd/b8c837_315199ac5c744f329ff34f56a1552820.pdf
    • https://static.usrfiles.com/ugd/704f6c_73666b2b19c24a7e94dae2155dc3cfbc.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_off0000504a.bin
1a937de0fff13560d2464f262aa28102302878b859e1bdbd9f080dda3533e31a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x504A 5288 bytes
font_01_sfnt_off00006245.bin
497e355caf684a5f5561121f809e031885c572f61767db7f05850575ee16f941		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6245 12984 bytes

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