Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6a23e923a116bad…

MALICIOUS

PDF

40.6 KB Created: 2020-08-31 15:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40ccc36b22728067cad0e1232ecbccb3 SHA-1: bf8d53c92e194e250cf64e4e10f86d60daefbb69 SHA-256: a6a23e923a116bada1d3ec4c94dd94828a3d241c0c848b4aa6af5beb36bb3bc8
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL "https://ttraff.me/pify?keyword=arduino+software+for+android", which is likely intended to lead the user to download unwanted software. The presence of numerous other links, many pointing to Shopify domains, suggests a link farm designed 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.me/pify?keyword=arduino+software+for+android
    • https://cdn.shopify.com/s/files/1/0438/2782/2752/files/adobe_acrobat_reader_latest_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75904593322.pdf
    • https://cdn.shopify.com/s/files/1/0434/0331/3315/files/wijaruv.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/jukamekiwoju.pdf
    • https://static.usrfiles.com/ugd/b8c837_73dfdb07c00641189e673e1cfdbd9d78.pdf
    • https://static.usrfiles.com/ugd/74e905_6ea721d7acb64514a17fde23584a2b51.pdf
    • https://cdn.shopify.com/s/files/1/0438/0157/5586/files/tutad.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/29137661206.pdf
    • https://cdn.shopify.com/s/files/1/0437/0864/5541/files/format_of_formal_letter_writing.pdf
    • https://cdn.shopify.com/s/files/1/0432/2816/8359/files/disability_studies_a_student_s_guide.pdf
    • https://static.usrfiles.com/ugd/f523c3_bb147329a139461991a223a0db7065b5.pdf
    • https://static.usrfiles.com/ugd/5360f8_6ba4a311a9c6495097599e89e3f7e307.pdf
    • https://static.usrfiles.com/ugd/0f5b72_4d9079d558224409adb0131f54f970d0.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_off00006123.bin
a77e8b186ef908907c18dd3fc9bad9a1c73050995e27bdb1ab5db7b8583038a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6123 4952 bytes
font_01_sfnt_off0000721d.bin
7bf94218368e6a7acf2849b0118f742bd823a58f3178265f1186a8d170994ea1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x721D 10420 bytes

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