Malicious PDF — malware analysis report

Static analysis result for SHA-256 4376b4dd8fc39353…

MALICIOUS

PDF

40.8 KB Created: 2020-08-17 10:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec1f30e6c282844041d37fef06852ea9 SHA-1: 99f542be4d3e07b3ca60dce82dad7788f6e611ea SHA-256: 4376b4dd8fc3935356631dc7f3731d76bef74833fc5e9d28954d6f2745c0b497
130 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.cc. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The presence of a 'download button' lure and the embedded malicious URL suggest a phishing or redirection attack aimed at delivering further malware or leading 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/pify?keyword=bundesliga+live+radio+app+android
    • http://files.brmandel.com/uploads/1/3/1/4/131407823/4141153.pdf
    • https://cdn.shopify.com/s/files/1/0431/4395/4594/files/918939586.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6157/files/biology_lab_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7985/1414/files/pokanobiwobumarozexiwus.pdf
    • https://cdn.shopify.com/s/files/1/0431/2337/6277/files/35173948952.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/jidufukisumorakiwunajoni.pdf
    • https://cdn.shopify.com/s/files/1/0433/2748/8168/files/53861403034.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/linkers_of_addition_and_contrast.pdf
    • https://cdn.shopify.com/s/files/1/0440/7679/4021/files/35998811376.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/latusafodamivejopi.pdf
    • https://cdn.shopify.com/s/files/1/0439/9307/1774/files/70977859051.pdf
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/52371176537.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/juxifewajudod.pdf
    • https://cdn.shopify.com/s/files/1/0435/4313/4362/files/animal_cell_organelles_and_their_functions.pdf
    • https://cdn.shopify.com/s/files/1/0428/9013/3663/files/cookie_clicker_open_sesame.pdf
    • https://cdn.shopify.com/s/files/1/0432/4687/8882/files/sepal.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_off00006223.bin
8b56b7942428dbd3e98e001513c80b40e3588b66f464d283153eca76f1537d11
pdf-font-stream PDF embedded font (sfnt) at offset 0x6223 5236 bytes
font_01_sfnt_off000073fc.bin
07acad79e72342d410b169a3987608c59c5daac1d0b20bf8ead3d112a53a3bfd
pdf-font-stream PDF embedded font (sfnt) at offset 0x73FC 9976 bytes