Malicious PDF — malware analysis report

Static analysis result for SHA-256 de3dc956ca61054f…

MALICIOUS

PDF

47.2 KB Created: 2020-08-31 03:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b2c8fa7b25e48dc5f5c4da5143df1f2 SHA-1: 29ba3c7633bd8efb8270ff3e6a969c1742db842b SHA-256: de3dc956ca61054fc6dd8c8e7f30eb0601e504677e63ec8710b8a4bd92e22d7f
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL `https://ttraff.cc/wix?keyword=dreaming+sarah+walkthrough` is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and numerous other links pointing to Shopify domains, suggesting a coordinated effort to distribute malicious content through a link farm. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=dreaming+sarah+walkthrough
    • https://cdn.shopify.com/s/files/1/0431/7095/5424/files/43626132917.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3077/files/pigazukapodipevipigunukuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5583/2471/files/after_dark_my_sweet.pdf
    • https://cdn.shopify.com/s/files/1/0437/0687/6055/files/appchina_free_ios.pdf
    • https://static.usrfiles.com/ugd/b8c837_72cc9411a6e04e4992ef968791678a7a.pdf
    • https://static.usrfiles.com/ugd/b58d21_998fbd65977448989b626ac3888d9d57.pdf
    • https://static.usrfiles.com/ugd/f84671_b9cf160fbc574b69b8b0a034962bda06.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_92a249fbee1c46e8925292121f11869d.pdf
    • https://cdn.shopify.com/s/files/1/0432/0562/3972/files/beyond_compare_command_line_report.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/air_crack_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/bodyguard_season_1_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4634/files/kitikukigozikerobuluk.pdf
    • https://static.usrfiles.com/ugd/906e9f_db5fb02b9b7a4abb942d2ebf4a7779a7.pdf
    • https://static.usrfiles.com/ugd/4f270c_38e999dbfd1246eba93fbba9939b9ccc.pdf
    • https://static.usrfiles.com/ugd/4826f5_7fca4f597b15454d937516a04d1ecff2.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf72fc765e04470a8f2e65bb3ff3554b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000679c.bin
58444614bbd84f180ab5ad2c8abdc5acb89e4a17b206fd0e52583226e32c9137
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x679C 12516 bytes
font_00_sfnt_off000055de.bin
bbf63298dad1d72dad80f628ab0485943e1445a2d036df2bed587b642372d3cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x55DE 5252 bytes
font_02_sfnt_off00008b22.bin
3d36777f60fa98e535079149d135978f165f08379bdfef404563d324b403c932
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B22 10888 bytes