Malicious PDF — malware analysis report

Static analysis result for SHA-256 e985598e9bfeaac3…

MALICIOUS

PDF

61.1 KB Created: 2020-09-12 06:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3aff5f4932f1e92e1baf1d92ce051b0c SHA-1: 4e218dee50912c261d2baf744f6a1450f00d5a80 SHA-256: e985598e9bfeaac35907f5e9ca785bf5166d26750283a34e4d920be4f500f54d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/pify?keyword=chiari+malformation+type+1+radio'. Additionally, another critical heuristic indicates a PDF link farm, with 'https://static.usrfiles.com/ugd/b8c837_70794ba9d425445caab772f7e50515e8.pdf' being the first URL in this farm. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary goal is to redirect the user to malicious infrastructure.

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/pify?keyword=chiari+malformation+type+1+radio
    • http://sixuwo.ycinvited.com/uploads/1/3/0/9/130969723/lagixesegisilox.pdf
    • https://static.usrfiles.com/ugd/b8c837_70794ba9d425445caab772f7e50515e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ed5dcf84bea4e1887ed27bc043eac2f.pdf
    • https://static.usrfiles.com/ugd/b8c837_235f415b5d794238838a0d95b049f254.pdf
    • https://static.usrfiles.com/ugd/b4609a_2c708adec8e547c680d42533a7834555.pdf
    • https://static.usrfiles.com/ugd/0d002d_95d4d2a390c74abdb638f70c39c21ef3.pdf
    • https://static.usrfiles.com/ugd/35c6e2_6f5c859e91a746269702e8cc0ea9811b.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_f99af7a3dda64d869f7b35cecc5f2057.pdf
    • https://static.usrfiles.com/ugd/912de2_5c906d2ea43d462ea812dcf9c1955550.pdf
    • https://static.usrfiles.com/ugd/943725_ef71b7d104c041f3a0da5181e9169bc3.pdf
    • https://static.usrfiles.com/ugd/bbd3cf_1383804c9f554da9b1ee72bdb55afbc1.pdf
    • https://cdn.shopify.com/s/files/1/0440/8590/3510/files/55710426197.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2533/files/46876077741.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/51131402124.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_off0000b195.bin
c326c75d48deed8a4e80aa085f7d69fe664591dbc2204bb4547b36d7b8258052		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB195 5160 bytes
font_01_sfnt_off0000c308.bin
b21131a1c40963b1c457cf1064cddcd8adc41c0f41d97acc17db414ed23abf87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC308 10624 bytes

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