Malicious PDF — malware analysis report

Static analysis result for SHA-256 f78b0e47fc6c5fc4…

MALICIOUS

PDF

34.9 KB Created: 2020-09-02 00:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b31f4bb92ed1d81f300fccdf7d0915e SHA-1: 16aaec67287ac140057d3dc9cbbcbae6f28400ef SHA-256: f78b0e47fc6c5fc4fc6ffde90a65f61da48728f3c04962410f35311176587ea3
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One of the primary links, https://ttraff.cc/wix?keyword=chote+bacho+ke+game, is identified as a malicious redirector. This suggests the document's purpose is to direct users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, and the document body is heavily obfuscated.

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=chote+bacho+ke+game
    • https://static.usrfiles.com/ugd/7ff653_67bb3ccd72ef4d6a945c410b2a55dc8c.pdf
    • https://static.usrfiles.com/ugd/26481d_eddfe499d1f34a06ba38d97ee4e0cd50.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab181c78135d41809a4d3d37dd25602a.pdf
    • https://cdn.shopify.com/s/files/1/0435/1141/4939/files/75423769308.pdf
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/xekikavupixalokag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74535711799.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5548/files/wivifidokokutobitogebe.pdf
    • https://static.usrfiles.com/ugd/5e8de6_a619c5e7fdfc46b68267a2bf7f59b87c.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5334062b76041b4906fa610bd60d58a.pdf
    • https://static.usrfiles.com/ugd/3aee12_9aa5e9c3c51c457c95b001c74daed42f.pdf
    • https://static.usrfiles.com/ugd/b8c837_c40bed4106164791b4c1f9a8b5d2d4de.pdf
    • https://static.usrfiles.com/ugd/8ba634_d3b1f80e6c034f7cb74ba545f2465d8f.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5dd74ee3ad4427f93df57699b33fe1d.pdf
    • https://static.usrfiles.com/ugd/6846fe_bd7148b54028407cbcb2bee7353e9e80.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b6e3b6021034155861f02ebd27a7b7e.pdf
    • https://static.usrfiles.com/ugd/10b11f_aead9700101c4ed496764a4856633d1a.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_off00004ea8.bin
0ebefd448de6859f66697d02fdf32521c498d2fbaab98a662bd10a06c478a68f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EA8 5016 bytes
font_01_sfnt_off00005f97.bin
a01afe42381dac53ed2f85331666a76fb24fd5aa3bb468cc570dfc558e6322e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F97 9296 bytes

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