Malicious PDF — malware analysis report

Static analysis result for SHA-256 212b8702d281c5b4…

MALICIOUS

PDF

44.8 KB Created: 2020-08-30 15:23:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 907bf34fac1280853e8c61f97df7b78d SHA-1: 538080cff3b7b67b52cc881991eaa7c7e9461e51 SHA-256: 212b8702d281c5b4d3ee5f4140117025914c6bc65fe27df39fbd24fcfc9102d4
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a link to a known malicious redirector, ttraff.com. Additionally, it contains a large number of external links, characteristic of a link farm, with the primary link pointing to a Shopify domain. The document body, though heavily obfuscated, contains the same URL and keywords suggesting a lure to attract users to click on malicious links.

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.com/wix?keyword=math+worksheets+pdf+7th+grade
    • https://cdn.shopify.com/s/files/1/0427/6482/8839/files/70953899724.pdf
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/6093019257.pdf
    • https://cdn.shopify.com/s/files/1/0430/0954/0257/files/xesuwa.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb535a3769be4c5fbdc1600a9f909bca.pdf
    • https://static.usrfiles.com/ugd/b5472a_c8323db3849946828cb0db1a7695637a.pdf
    • https://static.usrfiles.com/ugd/b8c837_69474a4c75ad4a7082ffc3506eac9552.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a8e8b88ce3f42ecaa4fc7149577fd9a.pdf
    • https://static.usrfiles.com/ugd/f63f29_6357ee1a5d1d4e41a19735c32a1250d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ba4341834854133b752abcf4036585c.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c8bc529c4e34f1496d0b4591b5addac.pdf
    • https://static.usrfiles.com/ugd/a1fb72_d9a2a15580cf4e6fad3c03110023e91e.pdf
    • https://static.usrfiles.com/ugd/b8c837_4428a6865b444c5a8e2229b284c24979.pdf
    • https://cdn.shopify.com/s/files/1/0432/5752/8480/files/waxadaxoteg.pdf
    • https://cdn.shopify.com/s/files/1/0440/9986/2680/files/33074267730.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_off00006feb.bin
865a3c35904b386c89fd8465c7e05b56cc4049664cf77dc2acfd22895b85eedd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEB 5512 bytes
font_01_sfnt_off000082cd.bin
b4a796667cc26cdfd7c5bda6710dfb1ba0a8eee73cdb1055786736dddbc5755d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82CD 10352 bytes

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