Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc5a176d8afb9291…

MALICIOUS

PDF

40.8 KB Created: 2020-09-02 04:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6abece2e1daa019625ce8a4e06797366 SHA-1: e0d22b00d9a6d7923377e3c5660eabd8e5b66067 SHA-256: cc5a176d8afb929179cfc8be5d20ed8eaa07856913bd31c735291c1d947cf93a
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to ttraff.com, which is flagged as malicious. It also contains a large number of external PDF links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning attempt. The presence of a 'download button' heuristic further supports the lure. The primary attack vector appears to be a deceptive link within the document body, leading to malicious infrastructure.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=cardiorenal+syndrome+review+pdf
    • https://static.usrfiles.com/ugd/850f07_c0dee135a0c54ee3b884aecb73c5f269.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_f8af221f31794582b8afa6cd1016055a.pdf
    • https://static.usrfiles.com/ugd/ae059d_480da5a9474a45f0a1efdaf488858394.pdf
    • https://static.usrfiles.com/ugd/b8c837_0887dcaaabfa42f485b4679c9130eee4.pdf
    • https://static.usrfiles.com/ugd/1c8c1e_ee1d31cd743a410f881396492491e080.pdf
    • https://static.usrfiles.com/ugd/df73ab_ad06002988f24584b61d5298b06c6974.pdf
    • https://cdn.shopify.com/s/files/1/0448/1168/1958/files/congestive_heart_failure.pdf
    • https://cdn.shopify.com/s/files/1/0469/5031/8241/files/37804224358.pdf
    • https://cdn.shopify.com/s/files/1/0429/9227/1519/files/xenesikezeru.pdf
    • https://cdn.shopify.com/s/files/1/0432/9639/1323/files/mesukuwar.pdf
    • https://cdn.shopify.com/s/files/1/0460/3369/8980/files/chevrolet_spark_ls_manual_review.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2753/files/15959324564.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/25036034296.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1920/files/nutab.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_off000061d5.bin
29c3a49a428263d20c415e7acce8dc5a488a62d63db8461eeb1185b17531342a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D5 5348 bytes
font_01_sfnt_off00007407.bin
a396db9ec8324f5a23ab0dce3955f6ee4ebf9b4e12d9096c6e2d26f3b7a1eaf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7407 10092 bytes

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