Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f1116ac7cee579…

MALICIOUS

PDF

32.9 KB Created: 2020-08-30 20:38:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 339a98ee74a21a11bfe607640f91d91f SHA-1: cedb73a9eb4679ca0e1ab3ba0230c874c2205001 SHA-256: 31f1116ac7cee57943fe44beea3b7cdfdb6d72ca60f15c44bb65265d17e528c9
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'ttraff.com'. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were extracted, the presence of a malicious URL within the document body strongly suggests an attempt to lure the user to a harmful site. The document body itself contains garbled text but also the same suspicious URL.

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.com/wix?keyword=dise%25C3%25B1o+de+productos+turisticos+beatriz+diaz
    • https://static.usrfiles.com/ugd/078c79_a1b93b26e11941dfbaa6c9cbf3101700.pdf
    • https://static.usrfiles.com/ugd/0511f5_189fe77fdcdb4d07a5af9cec61fcb3d5.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_b7c659ea009e46b0af6b6d818c0be486.pdf
    • https://static.usrfiles.com/ugd/b8c837_3bd8c060f0054c4aaf48efed9692b423.pdf
    • https://static.usrfiles.com/ugd/1849a1_fd042da4b5ca431e9da1704fad3f4da8.pdf
    • https://static.usrfiles.com/ugd/b8c837_465373ec0b344726a94903262a0b3410.pdf
    • https://cdn.shopify.com/s/files/1/0431/5388/3293/files/csf_fluid_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0437/3456/5025/files/acuerdo_gubernativo_89_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/2526/8889/files/56968243249.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_off000041e0.bin
2bf66a4e1b3e00ddc90ce4eedbc44c4420a39387da84fe64a0afa2e595fdb84b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x41E0 5436 bytes
font_01_sfnt_off00005426.bin
2f29af9c41c202ffba13daf860e29b012f0aa5d498ce988ca5bc35076f8f623a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5426 10092 bytes

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