Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff3b1fb20fb38da3…

MALICIOUS

PDF

42.8 KB Created: 2020-08-08 13:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70c09bfb4bfd297e33a80f8bf613c5f6 SHA-1: b82f9d0db10e2b938f9594c28e5f1848c76f6c6d SHA-256: ff3b1fb20fb38da325c659d3007dcbbf15af54f2be29cc28042533402545bec8
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to a link farm hosted on Shopify, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to exercises and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a malicious redirector and a link farm indicates a coordinated effort to distribute 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.cc/pify?keyword=radial+styloid+tenosynovitis+exercises+pdf
    • http://potud.mho-thevenue.com/uploads/1/3/1/4/131409090/4338608.pdf
    • http://files.emotionalfreedomwitheft.com/uploads/1/3/2/7/132740805/e64cc209.pdf
    • http://files.sbsyouth.org/uploads/1/3/0/7/130775017/kekulixe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3190/3902/files/89452550406.pdf
    • https://cdn.shopify.com/s/files/1/0432/9563/7659/files/53677484679.pdf
    • https://cdn.shopify.com/s/files/1/0437/1863/9771/files/fefapebufudaked.pdf
    • https://cdn.shopify.com/s/files/1/0437/4793/4359/files/anglomaniacy_food.pdf
    • https://cdn.shopify.com/s/files/1/0436/4291/2926/files/manimodilidorefelebinu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/xadotozut.pdf
    • https://cdn.shopify.com/s/files/1/0435/1413/4692/files/gefakine.pdf
    • https://cdn.shopify.com/s/files/1/0437/8463/4530/files/caustic_3_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/8641/3985/files/gosunomap.pdf
    • https://cdn.shopify.com/s/files/1/0431/4152/9754/files/49985134802.pdf
    • https://cdn.shopify.com/s/files/1/0434/9408/0677/files/setezi.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_off00005d8d.bin
78b6c295d41fcc2dbc7c29579534ee018f3f2ce789a3d2f346ae930ed226438d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8D 5172 bytes
font_01_sfnt_off00006f40.bin
efca66371eb68fd15da4b241eb7923560888ea285ce6a2d22cece7b722067da7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F40 9628 bytes
font_02_sfnt_off00009039.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9039 4324 bytes

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