Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f7a1e0f66391f1…

MALICIOUS

PDF

35.5 KB Created: 2020-09-01 12:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 932683eb8a89067a13436da3685fd35a SHA-1: f89a8bb67b74690acfca4903594b2fc63247728f SHA-256: 56f7a1e0f66391f1bc6d542a42220f29e031f6cf0fd7ecba68057103359765b0
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=just+wink+apk'. Additionally, it exhibits a PDF link farm heuristic, suggesting an attempt to distribute malicious content. The presence of a 'download button' lure further supports the attack pattern of tricking users into clicking malicious links. The document body contains obfuscated text but clearly includes the malicious URL.

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.ru/wix?keyword=just+wink+apk
    • https://cdn.shopify.com/s/files/1/0434/4076/7132/files/alzheimer_s_society_factsheet_power_of_attorney.pdf
    • https://cdn.shopify.com/s/files/1/0438/1245/4560/files/13784628501.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2214/files/94229165700.pdf
    • https://cdn.shopify.com/s/files/1/0432/7623/9014/files/comparative_adjectives_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0432/3845/7504/files/suwowefesuxewizamawode.pdf
    • https://static.usrfiles.com/ugd/60933b_c9ea55a111954b4f8c4100886e6fff21.pdf
    • https://static.usrfiles.com/ugd/64d889_a1622ce38f5e4db39d9a46843006ce38.pdf
    • https://static.usrfiles.com/ugd/74e9cf_7a216b98df98472c936b70f38da90f0c.pdf
    • https://static.usrfiles.com/ugd/3d0627_432745f95ac24963b8b81e483e7117ad.pdf
    • https://static.usrfiles.com/ugd/111c46_1f2a0d216fa8430dbc3c27acd77c3b0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_718fe999dfbf4161b05b24b2e5b4d640.pdf
    • https://static.usrfiles.com/ugd/d1c05f_f6323553016f4ecd9eda8c30ed5c9bb5.pdf
    • https://static.usrfiles.com/ugd/576447_fe57efdf1e89460189124f80b378fc4c.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_9f0f754d54804a1f98f9eec4fbaf8397.pdf
    • https://static.usrfiles.com/ugd/0049ca_adfb70fd0101424db9cbe2bdb270b74a.pdf
    • https://static.usrfiles.com/ugd/c1108c_2fa7d5a724cb40fab583110b407d429c.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_off00004de3.bin
e610667d6831138c7465c38d6ca5c0009c9d5012b01f5a433639b395790d89ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DE3 4828 bytes
font_01_sfnt_off00005e7f.bin
16b438ef313a15c111d1934958e57c56a4f8383769de01f72eeabf68ef4872c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7F 10268 bytes