Malicious PDF — malware analysis report

Static analysis result for SHA-256 acd2ae74ee3f5011…

MALICIOUS

PDF

46.7 KB Created: 2020-09-11 07:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7aa262f83042554f56411472819120eb SHA-1: 53add9dafa29b77dd93a6201f0aefa6aa0f42c74 SHA-256: acd2ae74ee3f50113634f2bb95cd702a97e659549dc15a14b82fc2c52186f891
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, many of which point to a redirector service. The primary heuristic indicates that the PDF links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract traffic. The file is likely used as a lure to redirect users to malicious 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.link/wix?keyword=diabetes+in+pregnancy+clinical+practice+guidelines
    • https://static.usrfiles.com/ugd/0251f0_abdb3400739a404fa9a37e002034fc51.pdf
    • https://static.usrfiles.com/ugd/45fd81_cf62c0ff2f65492eb03739d3ca33d55d.pdf
    • https://static.usrfiles.com/ugd/1e8759_a2146446925243bfa24168467a65752e.pdf
    • https://static.usrfiles.com/ugd/0f1814_05bb809ff34746ed85f9145094a246ce.pdf
    • https://static.usrfiles.com/ugd/db80c5_707f125b70e14f68a5eb41440d29de6a.pdf
    • https://static.usrfiles.com/ugd/2072cd_87c9906e6ddb4d0cbc83d79fc676df05.pdf
    • https://static.usrfiles.com/ugd/20d83a_b403a0ada3174bf197eab94ea35333f5.pdf
    • https://static.usrfiles.com/ugd/0d2908_5b09c2844eca4aebbe5aa5137cb4d67c.pdf
    • https://static.usrfiles.com/ugd/b926a8_f2c58e94d61446439b493f854131ffc0.pdf
    • https://static.usrfiles.com/ugd/97368a_e7a790c1b7f244569b5504d1567c6afb.pdf
    • https://static.usrfiles.com/ugd/5e8de6_e93543b3a0bb4f10b08b636bd47656e6.pdf
    • https://static.usrfiles.com/ugd/97634b_becaa1198a834a3da6dcd5775d5c31bd.pdf
    • https://static.usrfiles.com/ugd/7ef0dc_ce249cb770c04ca98e884e79080ec037.pdf
    • https://static.usrfiles.com/ugd/2b25e8_936ae2bdbccf4fd7af7f743b1970c2b4.pdf
    • https://static.usrfiles.com/ugd/ade4e6_80f796a14b9e41a695bab366a09bfea4.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_off00006300.bin
13877583adf334fef1d1bb0281e28b69ea0c47ac906e680e240ab5153c2d4799		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6300 5256 bytes
font_01_sfnt_off000074e1.bin
24ad855cb32b462cec394a352ba78e95b484d01f72fbb5cc1a27ddd6601aa59d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E1 12580 bytes
font_02_sfnt_off00009ce1.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CE1 4324 bytes

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