Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f6d5fe0a3a8557…

MALICIOUS

PDF

43.3 KB Created: 2020-09-02 15:28:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ec0f37ced55976a018cc7b4a613fc36 SHA-1: dd728f9a66d1d3fbc94446348d039b312b5bc9ae SHA-256: e8f6d5fe0a3a8557cc1efe2cbb5741f1d309b8b064f031713718bc0c33b869ef
120 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'Home sale capital gains worksheet' and embeds a large number of external links. One of these links, 'https://ttraff.com/wix?keyword=home+sale+capital+gains+worksheet', is identified as a known malicious redirector. The document structure suggests a link farm designed to drive traffic to potentially harmful sites, rather than providing legitimate information.

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=home+sale+capital+gains+worksheet
    • https://cdn.shopify.com/s/files/1/0429/1015/4908/files/28491881302.pdf
    • https://cdn.shopify.com/s/files/1/0437/0635/1771/files/wamaliganifitixufakutegar.pdf
    • https://cdn.shopify.com/s/files/1/0432/9383/5432/files/fagal.pdf
    • https://cdn.shopify.com/s/files/1/0432/0005/3408/files/gebogej.pdf
    • https://static.usrfiles.com/ugd/0a593f_b12de9cd2c3f4bfd843d794733fede8a.pdf
    • https://static.usrfiles.com/ugd/ee6770_418d44c7f04140ebab4292b7d5145154.pdf
    • https://static.usrfiles.com/ugd/b8c837_808dcbcd55bd42d580d2a6857c57554a.pdf
    • https://static.usrfiles.com/ugd/edb4a7_8bbf7aeea2af4455a1723007370d1f6d.pdf
    • https://static.usrfiles.com/ugd/b8c837_88574f32a474429e86cb0524108e9c2d.pdf
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/zerolupugixananag.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4828/files/36458711856.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/wedigupugujikepumuwi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3873/4496/files/55409481833.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/printable_worksheets_for_1st_grade_sight_words.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_off000068e8.bin
e45702bc50d3bd90e225bdab5e15f016d9907216666a581e21b008c119b389b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E8 5464 bytes
font_01_sfnt_off00007b64.bin
c3eb9ddf3832808b48abced7e05edb1e0300858471df458b215ffc3e8e8c4f0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B64 10784 bytes

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