Malicious PDF — malware analysis report

Static analysis result for SHA-256 5710f9e89fbe4615…

MALICIOUS

PDF

74.4 KB Created: 2020-08-29 12:13:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78084bd5615898ec3c53ea7cdc2ebfff SHA-1: e3dda526bdbb68d7e52de841a05d8f786e4c2648 SHA-256: 5710f9e89fbe46151440a34114afa4aae75e8b8973d58329e4ebdbfdc864140c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains numerous embedded links, a common tactic for SEO spam and phishing. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/wix?keyword=budismo+zen+y+psicoanalisis+erich+fromm+pdf'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to lure the user to click this link. The file also contains a large number of other PDF links, indicating a link farm strategy.

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.com/wix?keyword=budismo+zen+y+psicoanalisis+erich+fromm+pdf
    • https://static.usrfiles.com/ugd/b8c837_4c6641363833409b82816d758d0509e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f8cb55827564c9eb301d5babf67f6b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5f08c09417a4dd1b0fbff13dde06744.pdf
    • https://cdn.shopify.com/s/files/1/0431/8042/5370/files/rozoruzewejefulif.pdf
    • https://cdn.shopify.com/s/files/1/0440/0896/4246/files/actisense_ngt-_1_usb_driver.pdf
    • https://cdn.shopify.com/s/files/1/0430/2841/4618/files/contaminacion_atmosferica_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0432/2148/3687/files/zipej.pdf
    • https://cdn.shopify.com/s/files/1/0429/2077/1750/files/life_science_study_guide.pdf
    • https://static.usrfiles.com/ugd/b8c837_c87dbd217165444982bf33fe136bafaa.pdf
    • https://static.usrfiles.com/ugd/b8c837_0430c70f4fc94b58b4a252bb469f3863.pdf
    • https://cdn.shopify.com/s/files/1/0447/5827/0101/files/neologismo_semantico.pdf
    • https://cdn.shopify.com/s/files/1/0434/8788/7526/files/73576497186.pdf
    • https://cdn.shopify.com/s/files/1/0433/3089/6026/files/keto_breakfast_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0430/9460/5975/files/pegibimadawolamagaxuka.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_off0000d09e.bin
58d8a9ede0bfa412ef8cf446d0f52bdd66fc99755714b35fda47ebc857f1167b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD09E 5596 bytes
font_01_sfnt_off0000e383.bin
44ddb125cb6de2a889f71264462abafc36f111ce71f8b708424cee29a569364b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE383 10280 bytes
font_02_sfnt_off000106f2.bin
b34bc647a855ee836f1f15d23d07ef8fc86c66da9663e0d441a972b7f835d709		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106F2 16176 bytes

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