Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad0713340e570ea…

MALICIOUS

PDF

36.1 KB Created: 2020-08-31 14:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55d3d90115ec2b38c8b910a5605fc9f0 SHA-1: c64acb83f325beab37f3df54db58b6ea9d59f7cb SHA-256: 3ad0713340e570ea3907c4f36b6d72fe48419a5cb5537fc748fc78d70dea1e2c
128 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains text that appears to be a title ('Bol network/ game show app') and a URL, suggesting a social engineering lure. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick the user into clicking a link. The file also contains a large number of embedded links, many pointing to static.usrfiles.com, which is flagged as a link farm.

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.cc/wix?keyword=bol+network%252F+game+show+app
    • https://static.usrfiles.com/ugd/856cea_594cb2c1c1ca46b2bba43690ae4aff09.pdf
    • https://static.usrfiles.com/ugd/1b8612_095b020753dc4428a44f0dfeaf8c387f.pdf
    • https://static.usrfiles.com/ugd/217d68_3513b368fcdc4bc59ca8eb5fb7029caa.pdf
    • https://static.usrfiles.com/ugd/b8c837_57d8b4ca0f5e42e581439fe89b7e7018.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c8334de11cb427abfe117f3087708ba.pdf
    • https://static.usrfiles.com/ugd/cd79e3_f587c41e33744f93926fb401cf7dd637.pdf
    • https://static.usrfiles.com/ugd/b8c837_2bb1a4cef80c490d9b7138e7d24b7a8e.pdf
    • https://static.usrfiles.com/ugd/72b0e7_a110ba247be54719ab9ccbe96e870bc9.pdf
    • https://cdn.shopify.com/s/files/1/0434/9919/2472/files/zeledamabosofere.pdf
    • https://cdn.shopify.com/s/files/1/0463/4066/9602/files/gagumolavukabamonone.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/pozala.pdf
    • https://cdn.shopify.com/s/files/1/0428/6952/2599/files/multiplication_as_repeated_addition_worksheets_for_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/2647/2345/files/xuvurefixeves.pdf
    • https://cdn.shopify.com/s/files/1/0430/4958/2743/files/typhoid_fever_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/forup.pdf
    • https://cdn.shopify.com/s/files/1/0437/2224/4250/files/dodozutetafofafetizofagej.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_off00004fa7.bin
dcb3bd222d4db6af84bfab2f21035d969075cdf13bb4f59cca4d2eb3b1557cec
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FA7 5472 bytes
font_01_sfnt_off00006239.bin
defed86ad64005a3491128ce5243e49547fe844f6a31e5bd1ebdff54ffbf25d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6239 10208 bytes