Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf4bdb97e87832d…

MALICIOUS

PDF

42.5 KB Created: 2020-08-31 21:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 651ebf819865102f00ad685941616488 SHA-1: 6b60831894b31e0ecf5fbdbdd23effdc0a02c1e9 SHA-256: 7bf4bdb97e87832d622a2be979e5b8e3831d5a19f366ac5ef8c43af967643eba
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, characteristic of a link farm. One of these links, 'https://ttraff.link/pify?keyword=mi+a3+android+10+update+release+date', is identified as a malicious redirector. The document body, though partially corrupted, contains text related to Android updates, likely a lure to entice users to click the malicious links. The presence of a link farm and a malicious redirector strongly suggests an attempt to lead users to malicious websites.

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.link/pify?keyword=mi+a3+android+10+update+release+date
    • https://static.usrfiles.com/ugd/5af86b_2586e73d49e24bc1aab350dac25073ec.pdf
    • https://static.usrfiles.com/ugd/40b9e6_26be0ca35b874affb3939f7e7365f7ee.pdf
    • https://static.usrfiles.com/ugd/5b5da7_dcc57c938ea64d5391363cd9596728e1.pdf
    • https://static.usrfiles.com/ugd/b7082a_9775fb31d7324bb2a22d79960b0cc6f1.pdf
    • https://cdn.shopify.com/s/files/1/0434/1396/2919/files/52564315196.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lejozusuxawunulimedobina.pdf
    • https://static.usrfiles.com/ugd/430cb2_a83078f3126b41f584c4a857b7c70463.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb8f0d6663694b40a20dccc2731d356b.pdf
    • https://static.usrfiles.com/ugd/585b1d_6c664e5b65354b0a96fb2e9a59f9020f.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e3b4622226e425fbc95cc7d4cf7127b.pdf
    • https://static.usrfiles.com/ugd/b8c837_449531be947f4abbbab4ac6ba5463b66.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_off000066c3.bin
b7dbe138d2cb325eef78f6d7bd601a4265d8a72b214bf2b1ca10d207c59fff67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66C3 5316 bytes
font_01_sfnt_off000078ee.bin
e44588b151d1465482409ad0dc827c493e9c1b6765aa61ca473d2f30f44956f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78EE 10828 bytes

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