Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4eaa04cf77d7003…

MALICIOUS

PDF

63.4 KB Created: 2020-09-13 07:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00c7d2a60eddc52df30bd03a418b3c96 SHA-1: dd3f8be138077a79cbef48a5037ec7bae3071f55 SHA-256: a4eaa04cf77d700306f1aa1af56cfefc45ac605d6812fafb5ad8a74f6c07228a
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.cc/wb?keyword=drama%20triangle%20worksheet%20what%20is%20your%20primary%20role, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL and appears to be a lure for a worksheet, suggesting a social engineering attack to redirect users to malicious content.

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.cc/wb?keyword=drama%20triangle%20worksheet%20what%20is%20your%20primary%20role
    • http://files.educationairedale.co.uk/uploads/1/3/1/6/131606198/78a0263f1820.pdf
    • http://digoxon.createddesignsbytammy.com/uploads/1/3/0/7/130738731/8182129.pdf
    • http://bivotil.ajoyfulcreation1.com/uploads/1/3/1/4/131407492/vijafujobami.pdf
    • http://guxaxeb.maestrodonappert.com/uploads/1/3/2/3/132303354/kajakozokezan.pdf
    • http://files.erikakruse-photo.com/uploads/1/3/1/4/131484328/pumajaziloxabo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2802/9345/files/asterix_comics_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/jemorurejikam.pdf
    • https://cdn.shopify.com/s/files/1/0434/0498/4474/files/fekamulezi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0722/1658/files/25479190895.pdf
    • https://static.usrfiles.com/ugd/b27199_db25d913eb3843fab898ea2968464482.pdf
    • https://static.usrfiles.com/ugd/6a22cb_2ec9e95441b5404ab5dcc6ee5ae08cbf.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce2eb99890cb4ec88b7d458bb6da8de4.pdf
    • https://static.usrfiles.com/ugd/37321e_34a244af43e6471a9a914c113df4f871.pdf
    • https://cdn.shopify.com/s/files/1/0436/4160/2198/files/math_methods_in_the_physical_sciences.pdf
    • https://cdn.shopify.com/s/files/1/0435/8511/0177/files/37215034211.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_off0000b8da.bin
e529320b01b40dd9536a8741afb13974da0a60d4b7274fea046f00d91f5a2911
pdf-font-stream PDF embedded font (sfnt) at offset 0xB8DA 5488 bytes
font_01_sfnt_off0000cb7a.bin
ff2015cd299e68d200a940c7ea7fceab2e22d78c44d4fbb6fff6db64265ed568
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7A 10888 bytes