Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5087e7dd45d6b22…

MALICIOUS

PDF

35.2 KB Created: 2020-09-01 03:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1baf47d06c065badcc4d0aa3adcea854 SHA-1: 0a22a93f575410c0935874a484cb8d2afdc2d6d7 SHA-256: c5087e7dd45d6b225d359a4cb6ae9b5a2f6e37d26f49261fe651cb1694cc7c26
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, including one to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains text related to 'baby birth announcement template free' and the malicious URL. This suggests the document is a lure to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the PDF structure and link farm are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=baby+birth+announcement+template+free
    • https://cdn.shopify.com/s/files/1/0433/1087/4777/files/50964868008.pdf
    • https://cdn.shopify.com/s/files/1/0439/0620/3803/files/bryan_adams_heaven_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/5561/2058/files/script_executor_for_roblox.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_d9173ad3f31c41c4a505e6ab3af79544.pdf
    • https://static.usrfiles.com/ugd/fdee49_5adcec10f02d436f9ab5381287a057d7.pdf
    • https://static.usrfiles.com/ugd/8ab72e_4082834ec14d45da921e3455db0bb93f.pdf
    • https://static.usrfiles.com/ugd/902d29_65ddf27a2eff4021a0646b9c811cfdd2.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/32688567325.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/palikeluzekoxomevoripu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5365/9798/files/38567996710.pdf
    • https://cdn.shopify.com/s/files/1/0432/9911/1070/files/blind_date_application_form_channel_5.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/24420040910.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2b96ae9efea49cda02753a74a29d5b9.pdf
    • https://static.usrfiles.com/ugd/76156b_6b8b4324f79547b99d833ede138c5bc8.pdf
    • https://static.usrfiles.com/ugd/29c71c_9021f131e8774c04a2a1cfcb354c9b92.pdf
    • https://static.usrfiles.com/ugd/0d002d_25ac6706699b4cd8b4cb299d6ea07fec.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_off00004d3c.bin
9f266b07052bbb6c9b410fcc9ae75576c74615e71b9d1bcb81d0e426aa168f2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D3C 5368 bytes
font_01_sfnt_off00005f5d.bin
be13317fc336bb9c8f7089639467f59b36175472cdbd3dfb5c838cebfd2c7967		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5D 9628 bytes

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