Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb803aed2212a174…

MALICIOUS

PDF

36.5 KB Created: 2020-08-29 19:32:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90fb34a7c0e581575b801d9b9459fc2f SHA-1: 683579ddd44888f14d1ee7891dccf30aa0602cd0 SHA-256: cb803aed2212a174874305adbafe419d119ac6abaec50d83e406cb0c88fc282b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One of these links, https://ttraff.me/wix?keyword=blank+handwriting+paper, is identified as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for phishing or malware distribution.

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/wix?keyword=blank+handwriting+paper
    • https://static.usrfiles.com/ugd/08fe48_5140edeb9ca8442b899e3b66a759bc59.pdf
    • https://static.usrfiles.com/ugd/9219f8_a3494ec47e304e738ef8483d6e00693d.pdf
    • https://static.usrfiles.com/ugd/b8c837_099574f3ea9541caa72edc3b0b0028f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffb192fea79f455997aa342fe78ed78c.pdf
    • https://static.usrfiles.com/ugd/b8c837_761b9148caf1494e9b92c5d24bcd24fc.pdf
    • https://static.usrfiles.com/ugd/7e6083_4ffb0a8c93364c0e98f91884e27eeaca.pdf
    • https://static.usrfiles.com/ugd/b8c837_fab259615d8f4c029b38d19872f67ee8.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ee8e9394f0c476390bdde06fccc6296.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c2ec73c8f0a41dc804812534b93368a.pdf
    • https://static.usrfiles.com/ugd/856cea_2b52d0e0b71247be8d5203a6b028d134.pdf
    • https://static.usrfiles.com/ugd/b8c837_439ca287ba404a629e4fd1e99a16ca19.pdf
    • https://cdn.shopify.com/s/files/1/0432/1624/0807/files/carry_on_kesar_full_movies.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/92914279481.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_off000051be.bin
c3a80e19fdce0ad9077e029dd96aaa255ff5464287c1a3d6037d7a63ef01300c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51BE 5248 bytes
font_01_sfnt_off0000639e.bin
d8dfbe7a2ee30e5ee24059b65bd2dbdc99baef9717bcfcddedd98e5fa15de05a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x639E 10224 bytes

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