Malicious PDF — malware analysis report

Static analysis result for SHA-256 5876b86804c932e4…

MALICIOUS

PDF

41.2 KB Created: 2020-09-05 01:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 408a1ec5f4e8474eea06a16d4c4d1b77 SHA-1: dcd423a6d5a3c9f785d8e9e413211ae6bf85affd SHA-256: 5876b86804c932e4c8577cf6e1661204f3d48708118df8dc17f346fd788506eb
128 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which point to a redirector service. One such link, 'https://ttraff.me/wix?keyword=conditional+formatting+based+on+checkbox+google+sheets', is flagged as malicious. The presence of a 'download button' heuristic further suggests a lure to click these links. The document body, though heavily obfuscated, contains references to these URLs and appears to be a link farm designed to attract search engine traffic, ultimately directing users to malicious content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=conditional+formatting+based+on+checkbox+google+sheets
    • https://cdn.shopify.com/s/files/1/0436/3039/5552/files/gubokezemabiwejenuz.pdf
    • https://cdn.shopify.com/s/files/1/0436/1371/6643/files/30450450352.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/9472218304.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/texas_drivers_license_online_renewal.pdf
    • https://cdn.shopify.com/s/files/1/0432/1312/7835/files/xakimivinuni.pdf
    • https://static.usrfiles.com/ugd/405339_e655e31278a343eca51c024e0c422d75.pdf
    • https://static.usrfiles.com/ugd/3aca14_428bbc0bbc4d45aead63983c8ba1609b.pdf
    • https://static.usrfiles.com/ugd/035627_17399315cff34b899a113d87db632b86.pdf
    • https://static.usrfiles.com/ugd/09c3c7_5f8d699be5ee4aedacc96e69c76ff04b.pdf
    • https://static.usrfiles.com/ugd/b8c837_00599d8ac6fc4720becba405955ae7e7.pdf
    • https://static.usrfiles.com/ugd/b7082a_df8a95eb705b48488bbd6ca73d7651da.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_4777836071d94409bab19cd083f26d7f.pdf
    • https://static.usrfiles.com/ugd/cb5dea_af393501643848549282bb30f9e9ad28.pdf
    • https://static.usrfiles.com/ugd/b8c837_09334912cfe84fe58a2eb31cacd0fefb.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/zuvatibemaxaw.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/11935287818.pdf
    • https://cdn.shopify.com/s/files/1/0458/6438/6713/files/kuwadanokopiwalasov.pdf
    • https://cdn.shopify.com/s/files/1/0432/3531/1775/files/bucklers_mead_academy_uniform.pdf
    • https://cdn.shopify.com/s/files/1/0435/6515/4463/files/63913468388.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_off000061bc.bin
c1e72a29a5252f2a575e4cd4c3d7e3d0d7039d718d387374961365279ecf2947
pdf-font-stream PDF embedded font (sfnt) at offset 0x61BC 5612 bytes
font_01_sfnt_off000074a5.bin
484edcc858f18c20fb363d635c7c2ffe166d5c23de69f7ae3a4b0bd441b1b2ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x74A5 10132 bytes