Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff95c60a19a66110…

MALICIOUS

PDF

42.1 KB Created: 2020-09-06 22:36:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88d5afe0daf83a72c382f954a8ecaeff SHA-1: 401f4046e728c53b34cf163a50f2e9c5e4816ab4 SHA-256: ff95c60a19a6611035e017bff1bf50227023e7a7151027d38b52b2101fc5af85
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, which points to 'https://ttraff.me/wix?keyword=simple+and+compound+interest+worksheet+with+answers'. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The primary intent appears to be directing users to the malicious redirector.

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=simple+and+compound+interest+worksheet+with+answers
    • https://cdn.shopify.com/s/files/1/0432/5680/7586/files/beckhoff_el2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/5915/8940/files/battlestar_galactica_pilot_watch_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/7569/7830/files/bageterogakaridazilepo.pdf
    • https://cdn.shopify.com/s/files/1/0438/9978/1288/files/vuwulu.pdf
    • https://static.usrfiles.com/ugd/b8c837_5428e0bdcff242df9558c1964139c32d.pdf
    • https://static.usrfiles.com/ugd/77941b_aefea4bffff940afaa21798229b63c93.pdf
    • https://static.usrfiles.com/ugd/0e2875_d24e2d37c45c4175b1a368672e25bb1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a50513b71d841099b13879ecfc9f6ef.pdf
    • https://static.usrfiles.com/ugd/83f04e_91558c56685540a3a703b048726c6e7d.pdf
    • https://static.usrfiles.com/ugd/575363_0f1bf5abc74a4b409844f545096fe18a.pdf
    • https://static.usrfiles.com/ugd/05900a_710b68f33f9f442eb067edcaca1e2b8c.pdf
    • https://cdn.shopify.com/s/files/1/0457/0411/8428/files/komeza_unyirebere_by_charly_na_nina.pdf
    • https://cdn.shopify.com/s/files/1/0438/4145/4240/files/acrobat_reader_printer_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/7962/1026/files/vejibusevaxakimedenewuka.pdf
    • https://cdn.shopify.com/s/files/1/0435/0902/2886/files/refam.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_off000064d9.bin
2fa4635cbf32b61d40d41fde289fb3e700e99a4dac018054fef1ae2c005b4259		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64D9 5572 bytes
font_01_sfnt_off000077ae.bin
693aa27d0bfd8727268d7e7b66fd80a741b783421df31eaaf124d3189729b28f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77AE 10316 bytes

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