Malicious PDF — malware analysis report

Static analysis result for SHA-256 d60a8d33d1b6fb43…

MALICIOUS

PDF

58.1 KB Created: 2020-08-30 04:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a6d1b3c808f2ad46c31ff1a71e921cd SHA-1: 9cce2df6dcedf2487cf2a02450370c773353faab SHA-256: d60a8d33d1b6fb437238ed5fa8b8cd2afd87cd95be7e323999866adb33843877
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=ielts+reading+strategies+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The presence of a visual download button lure further supports a phishing or social engineering attack vector. No scripts were extracted, but the primary malicious activity appears to be redirecting the user to a harmful site.

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.ru/wix?keyword=ielts+reading+strategies+pdf
    • https://cdn.shopify.com/s/files/1/0437/6284/3797/files/mepebigutotifekole.pdf
    • https://cdn.shopify.com/s/files/1/0432/7161/8723/files/83585764160.pdf
    • https://cdn.shopify.com/s/files/1/0438/0337/7826/files/71371431379.pdf
    • https://cdn.shopify.com/s/files/1/0429/2483/4982/files/90615572153.pdf
    • https://cdn.shopify.com/s/files/1/0428/8449/7575/files/kamisama_kiss_vol_1.pdf
    • https://static.usrfiles.com/ugd/b8c837_821a8df385214f2a9ff727f0510777f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd6b989234fb4b62b9efc3dbff31a08e.pdf
    • https://static.usrfiles.com/ugd/b8c837_6263b29036f743c0a76294c39c240abd.pdf
    • https://cdn.shopify.com/s/files/1/0432/1024/4256/files/remove_mysql_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5825/files/gekej.pdf
    • https://cdn.shopify.com/s/files/1/0434/4253/6604/files/33871023818.pdf
    • https://cdn.shopify.com/s/files/1/0463/1920/6557/files/battlefield_vietnam_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0428/6460/7398/files/cd_action_1999.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_off0000a605.bin
6bb45e1f68a8752fbf87a7f62a8b91e9156adeca23fcf060ec716074c62024df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA605 5148 bytes
font_01_sfnt_off0000b78e.bin
8101a395608066632ced4f070d07cb272dc65c2678ac377ff00f535413054c5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB78E 10792 bytes

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