Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbad1a729df252d7…

MALICIOUS

PDF

44.2 KB Created: 2020-08-30 17:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a0b45ca19e5dcf6ea0ca3f5676075f4 SHA-1: 09143973a951be0c92175c6b0cf8f7291f99baba SHA-256: bbad1a729df252d7801d0b592786f790d4473ec5108736f18a7d77958f221cf8
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a primary link redirecting to a known malicious domain (ttraff.cc). The document body, though heavily obfuscated, contains text suggesting a lure for a 'clinical pharmacology book free download'. The heuristic firings indicate the PDF is a malicious redirector and part of a link farm, designed to drive traffic to potentially harmful sites.

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=clinical+pharmacology+book+free+download
    • https://static.usrfiles.com/ugd/384ea4_68cffa54984b4ecfb8124d3d49122bec.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ddf5f4dfa9344e29153c837d65911be.pdf
    • https://static.usrfiles.com/ugd/45fd81_52554e4905be442e9afcaba2e741a019.pdf
    • https://static.usrfiles.com/ugd/accd1f_e07c2ad3838144d2b20f1346399af44f.pdf
    • https://static.usrfiles.com/ugd/b8c837_61dc039615f94bcd81525e48d6b394d8.pdf
    • https://static.usrfiles.com/ugd/36f25b_37075770d216418fafe8963384f3ec56.pdf
    • https://static.usrfiles.com/ugd/34e21e_c6f295f5610543ef92777ab276dfb739.pdf
    • https://static.usrfiles.com/ugd/409ca8_1ab798ef05a34408afde9a1d4491d9a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_14104f3d5adf4f858db1a113b1010be9.pdf
    • https://static.usrfiles.com/ugd/dd4472_a50acb4f47c74e23b82f7c3e4acdb1eb.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_996139133655477bb169797e4588edef.pdf
    • https://static.usrfiles.com/ugd/b42fd6_64fa1f77c8e648d8b053512da30db695.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_19cc22d7a25a4b839e1e2b35a6624849.pdf
    • https://static.usrfiles.com/ugd/253000_6fbcd4b5a5344630be9bb48e0bff51a4.pdf
    • https://static.usrfiles.com/ugd/07ef24_2803b57b8610407e89ac70603fdc64ce.pdf
    • https://static.usrfiles.com/ugd/9757e7_99d9e57986a04f07839aed8480c50abe.pdf
    • https://static.usrfiles.com/ugd/b8c837_c1c9d490aab846f5b80f94d44adeccb7.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd75bc2ae29745f791e54eaecc277743.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
font_00_sfnt_off00005dd4.bin
154e0640cced06f5621a4274eba5a864ee159fc025ab63147d937612ee9354cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD4 5520 bytes
font_01_sfnt_off0000706c.bin
d1179ce616355b4df30e23756f89338ca8624723a4e8ffb62c9c1cbdb31c324f
pdf-font-stream PDF embedded font (sfnt) at offset 0x706C 10812 bytes
font_02_sfnt_off0000951c.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x951C 4324 bytes