Malicious PDF — malware analysis report

Static analysis result for SHA-256 4282928532ca49c8…

MALICIOUS

PDF

32.4 KB Created: 2020-08-30 23:20:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c35a5a665f9faac89f803a7316773bb SHA-1: e29b2dea182278f88a79fdd351b4b2bd0b53349b SHA-256: 4282928532ca49c8e4e6763d8ceee887b15876f7c04b9e095f1534e586a44166
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.com/wix?keyword=pobre+ana+in+english+chapter+4'. Another heuristic indicates a PDF link farm, with 'https://cdn.shopify.com/s/files/1/0431/1692/0996/files/datus.pdf' being the first URL in this farm. The document body contains text related to 'Pobre ana in english chapter 4', suggesting a lure.

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.com/wix?keyword=pobre+ana+in+english+chapter+4
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/datus.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9529/files/20840505187.pdf
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/pozovitavenunawuvapekaxaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/songs_about_saturday.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1354/files/zopuka.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/18210995158.pdf
    • https://cdn.shopify.com/s/files/1/0431/4287/3245/files/free_template_for_wedding_invitation_video.pdf
    • https://static.usrfiles.com/ugd/b88e3d_0887284b1f4947d1b601842bfab3e367.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c60dc9215f24256a5f9b967047a8e19.pdf
    • https://static.usrfiles.com/ugd/67e251_4e3ae932c36242d4bc07374de0fea348.pdf
    • https://cdn.shopify.com/s/files/1/0438/0993/1426/files/20179181553.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/bekuk.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_off00004332.bin
431a5341896af78ec860c3568982673508a657dc813a538383a62933c4500e5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4332 5424 bytes
font_01_sfnt_off00005598.bin
2937c0488066632eb5ce338d5dc049ac2e5752157c6702937bb141066b5b4e6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5598 9184 bytes

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