Malicious PDF — malware analysis report

Static analysis result for SHA-256 666ec71ee0b3425f…

MALICIOUS

PDF

45.7 KB Created: 2020-08-30 12:38:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b3bb1cb424247145ad07a7ed134a2df SHA-1: 1a0ed89ba7862bc35f88700ad0465b6b84db7085 SHA-256: 666ec71ee0b3425f7e4bf3c0466d09d5a5901371714b05a6fe750fd01563cf61
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing indicating a malicious redirector link to ttraff.ru. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for a phishing or malware delivery scheme.

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=historia+da+qualidade+resumo
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/2888/1313/files/i_wanna_be_down_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0463/4932/0349/files/bosch_washing_machine_manual_classixx_1200_express.pdf
    • https://cdn.shopify.com/s/files/1/0435/5316/1367/files/fivutolixozilofejufij.pdf
    • https://static.usrfiles.com/ugd/b8c837_644cac6e97d74320b30df440a161a425.pdf
    • https://cdn.shopify.com/s/files/1/0431/3556/5990/files/tgi_fridays_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0431/4411/8423/files/windows_movie_maker_2._6.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7660/files/4376395944.pdf
    • https://static.usrfiles.com/ugd/1e4819_622e3b379084449c9671f590b3d8a4ba.pdf
    • https://static.usrfiles.com/ugd/f55bec_fd0aca10bc1b44418b957484a763ea91.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064d4.bin
3d7166a4e8f5674696e3d8e59d1c0832864cdeb264ae14c2a5cd9cba6b9771c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64D4 4832 bytes
font_01_sfnt_off00007533.bin
684aaad5b968bbd12baa6fd34b73c9e359fa1a86c84881054cf706f1ed6b0352		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7533 12356 bytes
font_02_sfnt_off00009ad3.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD3 4324 bytes

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