Malicious PDF — malware analysis report

Static analysis result for SHA-256 dac42d1f933b0962…

MALICIOUS

PDF

37.7 KB Created: 2020-09-07 02:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69cec27da9300943cca5f209e7912af6 SHA-1: e07d3c04c5c385989287ad193637aaea88d07e47 SHA-256: dac42d1f933b0962b37ea65dd4ef46478177e13034b5d8fd1b2e56c710b688c6
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which points to 'ttraff.club'. The document body, though partially corrupted, contains text related to school uniforms and the malicious URL, suggesting a lure. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are benign Shopify links, likely used to obscure the malicious redirector.

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/wix?keyword=uniformes+colegio+agustiniano+floridablanca
    • https://cdn.shopify.com/s/files/1/0432/3121/5774/files/60391454199.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/vokagifizalesotizus.pdf
    • https://cdn.shopify.com/s/files/1/0427/8868/3932/files/android_emulator_showing_black_screen.pdf
    • https://cdn.shopify.com/s/files/1/0434/0970/3061/files/arquitectura_de_computadoras_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/16184556262.pdf
    • https://cdn.shopify.com/s/files/1/0435/1016/9759/files/juzuji.pdf
    • https://cdn.shopify.com/s/files/1/0434/2241/7047/files/biomassa_para_energia_livro.pdf
    • https://cdn.shopify.com/s/files/1/0434/4122/5880/files/28977051107.pdf
    • https://static.usrfiles.com/ugd/a0d21a_e32d91478b6f4ea493079d32d9deb804.pdf
    • https://static.usrfiles.com/ugd/516574_953f7631f8ee49a8b8bca7ba87bad0a0.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85947343199.pdf
    • https://cdn.shopify.com/s/files/1/0435/2979/7787/files/xesuzozod.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/dumidolozaboti.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/how_to_add_to_evernote.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wulusiwebope.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_off000052a3.bin
e70798c67e78f53bd341788dce94668a2b8398ce43340d67bb8b9fe0314d6adb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52A3 5472 bytes
font_01_sfnt_off0000652a.bin
61e799b40b9509bba39d316e01bfedd9b204ebbc6f8f8274b62842b9dd1ebe1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x652A 10716 bytes

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