Malicious PDF — malware analysis report

Static analysis result for SHA-256 3550287ba9be00ba…

MALICIOUS

PDF

37.4 KB Created: 2020-09-18 09:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b04f5a7304aabc57c7af325b06450573 SHA-1: b58db79c0ea2b5e333d729cf37d6e4772bd2a639 SHA-256: 3550287ba9be00ba35d54233cd179aa43dd6b511e31f3ac029a128c98748f71e
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is ttraff.me, which is used in conjunction with a lure related to a 'Harry Potter emoji quiz'. The document body, though heavily obfuscated, contains this URL and references to the quiz. The presence of a large number of links hosted on Shopify suggests a link farm or SEO poisoning tactic to distribute the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/wix?keyword=harry+potter+emoji+quiz
    • https://cdn.shopify.com/s/files/1/0430/6052/7253/files/vunax.pdf
    • https://cdn.shopify.com/s/files/1/0427/3537/0407/files/58885242394.pdf
    • https://cdn.shopify.com/s/files/1/0429/4495/4527/files/tokenumagewerujedafo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4054/files/selujivewobilejevafo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2043/files/18331052275.pdf
    • https://cdn.shopify.com/s/files/1/0434/7677/9165/files/joint_of_order_statistics_proof.pdf
    • https://cdn.shopify.com/s/files/1/0462/2955/3301/files/pdf_candy_to_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/html_code_for_login_page.pdf
    • https://cdn.shopify.com/s/files/1/0478/7214/7622/files/rate_my_vc.pdf
    • https://cdn.shopify.com/s/files/1/0432/8715/0752/files/sukume.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/waxapujepomovabot.pdf
    • https://11118ea5-bc58-42e1-81fb-a870dbf7f596.filesusr.com/ugd/b9801a_29080d30de9d40e18dbf4f260324b7ad.pdf?index=true
    • https://687c9abb-c258-4a5b-a2fd-99f16a49c1fb.filesusr.com/ugd/4a2613_5cf34e7f425c47f3b9e47129e9fb1fbc.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004732.bin
81daa13f5eac0e73681f767e0732fe2fa476b225e444ffeb4a492cbb6331d0ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4732 4848 bytes
font_01_sfnt_off000057ca.bin
f212b8b81a6af4b040089a5efc6217859b6e6e19c532797de56f0236a2590c8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57CA 10200 bytes
font_02_sfnt_off00007aa0.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA0 4324 bytes

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