Malicious PDF — malware analysis report

Static analysis result for SHA-256 a27c66c0a26afd1c…

MALICIOUS

PDF

41.2 KB Created: 2020-08-28 20:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89aaaedc128cdb62649db18067b7e807 SHA-1: ab35d40ab1acdf5b40d0247b7200888ef8486afa SHA-256: a27c66c0a26afd1c8f337c2d479d937af386303820bff15edf8ada9ae92351a1
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=smule+app+review', which is flagged as malicious. This suggests the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing. The presence of numerous PDF links, many pointing to Shopify domains, indicates a link farm strategy to obscure the ultimate destination.

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.com/wix?keyword=smule+app+review
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/vixozofobulos.pdf
    • https://cdn.shopify.com/s/files/1/0433/4010/3845/files/69097253022.pdf
    • https://cdn.shopify.com/s/files/1/0435/7881/8715/files/nipexe.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8a828d5db344b34b4a16364c9714aa7.pdf
    • https://static.usrfiles.com/ugd/b8c837_5af6dc5364c24ce1a528da0d279820a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_23de9b25a7244af8b20cabae8e05d6d0.pdf
    • https://cdn.shopify.com/s/files/1/0431/3248/5799/files/dafotiluw.pdf
    • https://cdn.shopify.com/s/files/1/0435/7862/2111/files/gaxixurabaluditupujope.pdf
    • https://cdn.shopify.com/s/files/1/0461/5549/7635/files/81899077800.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1354/files/blank_character_sheet_5e.pdf
    • https://cdn.shopify.com/s/files/1/0434/3844/0598/files/55637444256.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6516/files/lixoteragejemabexugat.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/37600633540.pdf
    • https://cdn.shopify.com/s/files/1/0452/4562/8578/files/android_messages_backup.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058ec.bin
12ffc3a4173f47b14d1738c47178effbf2c550c8c75daff743d508fe3772aacb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58EC 4628 bytes
font_01_sfnt_off000068a5.bin
6c51e794ec091bc272f71687d99064b7bde83e6b795755121bc389645cf1202b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68A5 9812 bytes
font_02_sfnt_off00008a40.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A40 4324 bytes

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