Malicious PDF — malware analysis report

Static analysis result for SHA-256 c283d1b2e1d035db…

MALICIOUS

PDF

43.8 KB Created: 2020-08-30 20:30:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ee9d0d9d17dd276738083b8d9ecb41d SHA-1: 9990d77fea6243c8e983c0c53091e9af322fcce7 SHA-256: c283d1b2e1d035db4ecbbd5998c7384ae46e59d19f927236f7bb0a43c016af22
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of a link farm heuristic further suggests an attempt to direct users to potentially harmful content.

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.ru/wix?keyword=memorias+de+un+amigo+imaginario+libro
    • https://static.usrfiles.com/ugd/b8c837_fe8aeb1f89ed49f4afa2aec51ad6f582.pdf
    • https://static.usrfiles.com/ugd/b8c837_97715f0395ef4dd58396046bfa7ab6f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb5060f414fa44a087299213ea30f6b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_79014978337143ef8aa256f3ebac420b.pdf
    • https://cdn.shopify.com/s/files/1/0436/8996/7781/files/1922933511.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/benim_hocam_tyt_tarih_video_ders_notlar.pdf
    • https://cdn.shopify.com/s/files/1/0427/7266/0390/files/86929040584.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/2008_mitsubishi_eclipse_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/14561978647.pdf
    • https://cdn.shopify.com/s/files/1/0433/0317/4308/files/four_seasons_vivaldi_sheet_music_piano.pdf
    • https://cdn.shopify.com/s/files/1/0429/0949/9548/files/58109550596.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/debilubamekuse.pdf
    • https://cdn.shopify.com/s/files/1/0429/5639/0551/files/13688193669.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3333/files/concrete_structure_properties_and_materials_pdf.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_off00005ff8.bin
c63ce37ea760dea173c68efae1c9b655f84b9ddba17bcc7221e9fe3c05d0fbec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF8 3260 bytes
font_01_sfnt_off00006b89.bin
cf7a92b6bb578f0415298c125e5086cae0f3dc42af331b1301ac7c2006f7973b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B89 5292 bytes
font_02_sfnt_off00007d6a.bin
587c90557963fd1754f65ae58dbf70daff3355f8707e4fba4baafeca7fc8f0a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6A 11188 bytes

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