Malicious PDF — malware analysis report

Static analysis result for SHA-256 871c09bedc7c5e9e…

MALICIOUS

PDF

49.0 KB Created: 2020-07-29 19:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 877a214887b27efdea4a6cd2ef09d0d2 SHA-1: 52771d96070ac5352d1d9ca1757b2c01ad65b47e SHA-256: 871c09bedc7c5e9ec8a031c8320f9e748d1a9710d8968de754758ae253564279
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 critical heuristic firing indicating a link to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'chilling adventures of sabrina comic book pdf'. The primary malicious IOC is the redirector URL, which likely leads to further malicious 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/pify?keyword=chilling+adventures+of+sabrina+comic+book+pdf
    • http://files.beam-ugentvub.com/uploads/1/3/1/6/131636651/24a6baaaffce40.pdf
    • http://files.flytotheskyteam.com/uploads/1/3/1/4/131453253/4730622.pdf
    • http://files.golffordreams.com/uploads/1/3/1/4/131452817/6936473.pdf
    • https://cdn.shopify.com/s/files/1/0437/8581/4177/files/rowedebajisinowesewogebaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54183348773.pdf
    • https://cdn.shopify.com/s/files/1/0428/3275/6902/files/77809790425.pdf
    • https://cdn.shopify.com/s/files/1/0432/0323/1903/files/vopafeteligu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/fugudapekiwifefage.pdf
    • https://cdn.shopify.com/s/files/1/0429/2201/6934/files/26077310971.pdf
    • https://cdn.shopify.com/s/files/1/0429/5072/1699/files/pogovuk.pdf
    • https://cdn.shopify.com/s/files/1/0436/5287/4390/files/91345888810.pdf
    • https://cdn.shopify.com/s/files/1/0430/7078/3645/files/sesofomowupiboxiteme.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/satatetuxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4756/8039/files/94459985840.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/
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008101.bin
87b88cd74fc17df1b212d7e644c83fbdd0acc72fe0a2f03a1ba32b3e82895e4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8101 5736 bytes
font_01_sfnt_off0000945c.bin
d044b95258abc2c8356cc948266aa9524aa8723d83d896fae4d4bbacbe24bcc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x945C 10064 bytes

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