Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d90a2eee38884c2…

MALICIOUS

PDF

40.3 KB Created: 2020-08-19 01:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98dffbb184c54568945fb5a8bc44a7b3 SHA-1: 779fc0ea638d61568760896ebff651174643f20b SHA-256: 8d90a2eee38884c28cfc3b468bb8eb31b48253e9b78314db959dc7a20e38c415
150 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, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=scream+4+imdb+parents+guide', is designed to lure users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external documents, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=scream+4+imdb+parents+guide
    • http://files.thatmusicdogkid.com/uploads/1/3/1/4/131483097/a3aa2d3b2f.pdf
    • http://files.ruralcommunityfirstresponders.com/uploads/1/3/1/8/131872269/tavefixegokasalenot.pdf
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/72944228265.pdf
    • https://cdn.shopify.com/s/files/1/0436/0152/6948/files/is_alfred_hitchcock_presents_on_netflix.pdf
    • https://cdn.shopify.com/s/files/1/0446/0806/1603/files/huawei_p30_pro_camera_review_android_authority.pdf
    • https://cdn.shopify.com/s/files/1/0432/5031/9517/files/ny_giants_football_injury_report.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/39443087681.pdf
    • https://cdn.shopify.com/s/files/1/0434/6370/4738/files/xovubuziworonebumedixi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1798/4405/files/pitusupupumabexegetov.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6721/files/lutowaruborexa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8552/1311/files/behaviourism_theory_in_education.pdf
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/14799609865.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_off00005fdf.bin
331857a5f98e01747fddd10ab18c8e0487c18774a3fd583acef81a5470bdc8d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDF 5692 bytes
font_01_sfnt_off0000731a.bin
582618f9dd3cab0ccda9400c1faf4525143539a54421f23ed4ef068230da0f21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x731A 9908 bytes

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