Malicious PDF — malware analysis report

Static analysis result for SHA-256 da4bb5349c66f5bd…

MALICIOUS

PDF

47.0 KB Created: 2020-08-31 13:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 664ed79fa49e6a60dbd989795dd35104 SHA-1: 14502f76e92757f2d6a72a63ccb23f9d78e08ef4 SHA-256: da4bb5349c66f5bdc3898090fa78608d488efa437741a108ed3713730d2c1dae
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the text 'Inclining test report' and the malicious URL, suggesting a lure to trick the user into clicking the link. The presence of numerous external PDF links hosted on Shopify further indicates a link farm or SEO poisoning attempt to distribute malicious content.

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.cc/wix?keyword=inclining+test+report
    • https://cdn.shopify.com/s/files/1/0438/8097/2456/files/nafenawexofuvimigefoboxa.pdf
    • https://cdn.shopify.com/s/files/1/0448/0411/2545/files/94834051856.pdf
    • https://cdn.shopify.com/s/files/1/0431/7301/9808/files/76987376585.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4702/files/wugipapupixegufabele.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/wuduja.pdf
    • https://cdn.shopify.com/s/files/1/0432/8387/3942/files/53202768753.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0334/files/28834808318.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/jenixusopigevutewib.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8037/files/51821902043.pdf
    • https://static.usrfiles.com/ugd/de65f7_ade32d78b1ba4203bfba94e77a514687.pdf
    • https://static.usrfiles.com/ugd/b8c837_735c6288f6dc435e9ebd8326560b260d.pdf
    • https://static.usrfiles.com/ugd/0c4177_9a13f016d34440f496a2e9a2e558aa3e.pdf
    • https://static.usrfiles.com/ugd/a1fb72_30f0b2c6a0ac41f8a9a222232398e0d5.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_off00007ca0.bin
b3cf102e714f6260ec9ebb814821cd82617718404f0b006406017205198195fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA0 4828 bytes
font_01_sfnt_off00008d29.bin
8ae3f28d2c2898c6026e13f00ee679b277f1da0117afa7543f9fad7cf0d82379		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D29 10144 bytes

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