Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7f071a4945fd75a…

MALICIOUS

PDF

88.9 KB Created: 2020-09-08 01:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53aa99397713eeff13f01ffb1274e970 SHA-1: 3a29dc5576e0518abd90424fb22df4169ff29037 SHA-256: b7f071a4945fd75ac61cbe89b8417739c585572eb0b2940759a9429aba10480f
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of embedded links, suggesting a link farm or phishing attempt. The presence of a 'download button' heuristic further supports a lure-based attack. The primary malicious URL identified is https://ttraff.club/wix?keyword=rheumatic+fever+diagnosis+guidelines, which is likely used to redirect the user to a malicious 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.club/wix?keyword=rheumatic+fever+diagnosis+guidelines
    • https://cdn.shopify.com/s/files/1/0431/9045/2385/files/69112338536.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/fakarewogevexisipajum.pdf
    • https://cdn.shopify.com/s/files/1/0434/4528/9112/files/41491461243.pdf
    • https://cdn.shopify.com/s/files/1/0438/9853/6091/files/encyclopedia_of_astronomy_astrophysics.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/star_wars_battlefront_2_1._3_patch.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38967404473.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/vmware_workstation_10_with_crack.pdf
    • https://cdn.shopify.com/s/files/1/0435/9939/7027/files/75675410165.pdf
    • https://cdn.shopify.com/s/files/1/0432/8135/0820/files/sebeludurema.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4917/files/64863439354.pdf
    • https://cdn.shopify.com/s/files/1/0441/0825/1288/files/zebexidogev.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_off0001183a.bin
b30e2ea8fdaa916b8c0acb5828238ee5f3e1adc197d027dbde2597c742790007		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1183A 5500 bytes
font_01_sfnt_off00012ad0.bin
b97eef4dab8bd059fc93c98f41bbce03372163d953a0f5c445ba004a2999c928		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD0 13848 bytes

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