Malicious PDF — malware analysis report

Static analysis result for SHA-256 c55450c1d6fd4d3f…

MALICIOUS

PDF

43.3 KB Created: 2020-08-30 03:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7579300ebc397c2e0f90ce69459708e8 SHA-1: 2a87030b4361bb43dfddef696369534ecc2e2896 SHA-256: c55450c1d6fd4d3f4f61de08c8ffcea4deb705da4074f5f904eb9c1bb2a52af4
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/wix?keyword=raspberry+pi+for+dummies'. This URL is presented within the document body, disguised as a guide. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which point to static.usrfiles.com. The primary malicious intent appears to be redirecting the user to a harmful site.

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.me/wix?keyword=raspberry+pi+for+dummies
    • https://static.usrfiles.com/ugd/24853a_83eef6f0ec834605a9c56ad95c1ff080.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d9209eeff2e4894aded3050dffe764c.pdf
    • https://static.usrfiles.com/ugd/b8c837_72a77c6f42df4815a362f73cc5c5168a.pdf
    • https://static.usrfiles.com/ugd/b8c837_1204c86a1a0149bda8300cb317354a4b.pdf
    • https://static.usrfiles.com/ugd/cafc24_c49aa7ac6a6941dfa20b877dc40148aa.pdf
    • https://static.usrfiles.com/ugd/455f95_87affdb2c27149148ed64a161791d9fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_f86210dab46140d2aa205a30258b3991.pdf
    • https://static.usrfiles.com/ugd/e5a943_a18ae0c6fb94483fb3699ac57fa0ae78.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/catalogo_bornes_phoenix_contact.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2894/files/22041822817.pdf
    • https://static.usrfiles.com/ugd/33a16d_faafc46dd78b4ef2b41fd475dccfc258.pdf
    • https://static.usrfiles.com/ugd/e2b09b_5baa3be97752443f88b549a79f4532d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_56f9e3dc007b4eee92cd0441266ca5ea.pdf
    • https://static.usrfiles.com/ugd/3826db_c556f81796d8451aae546bf95df48f1f.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_off00006b95.bin
f8573807c2a34c84b593d52b0f9f0424e9d2ecada962545ff55741b5ee703b1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B95 5404 bytes
font_01_sfnt_off00007ddd.bin
4d75c3f35e4800f72d1b38b4b87b841e8c0de43a9fbc76427990f0c5cf106d5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDD 10164 bytes

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