Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd35394978a87c6…

MALICIOUS

PDF

52.0 KB Created: 2020-09-02 02:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74224e41936f1cb8f21a7f4a52b630f1 SHA-1: 81c4350880002cf78195ac7d7fa5cba5c6b6ba40 SHA-256: 6bd35394978a87c63ec38d64877d1434270debfc0f7a38d0505ba8ff2bd1a8b2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, many of which point to a redirector service. The primary redirector URL is associated with malicious activity, suggesting an attempt to lead users to a compromised or malicious site. The document body, though heavily obfuscated, contains keywords related to invitations and links to external PDFs, reinforcing the lure.

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.link/wix?keyword=online+holiday+party+invitation+templates
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/8127dd_ee89a393fbe9458d87dc01d7a506a273.pdf
    • https://static.usrfiles.com/ugd/b8c837_f09e7c95316f4fa48aca75a811768719.pdf
    • https://static.usrfiles.com/ugd/3cb679_a206470ef73e46049d0628d438e223dd.pdf
    • https://static.usrfiles.com/ugd/f4de5e_47209e978f0d4051842f17c1b091e323.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ce50a00bcfa4c2d85261539ac5df8fb.pdf
    • https://static.usrfiles.com/ugd/2072cd_867ee7b3f85b4aacae1b78189076a326.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/34317169614.pdf
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/contest_of_champions_mastery_builds.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0053/files/45328309152.pdf
    • https://cdn.shopify.com/s/files/1/0440/7646/6328/files/chrome_os_vs_ubuntu_performance.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_4ccf7ee93deb4b03a5da28b2e846e023.pdf
    • https://static.usrfiles.com/ugd/9b5f63_bf5c6c8f09744085a8dfd2c1c58625fe.pdf
    • https://static.usrfiles.com/ugd/289c5e_d2ea7e3812ae42718a6b0341809877f0.pdf
    • https://static.usrfiles.com/ugd/6df952_ae21388d116e4fdaa9bdd247e9e787c5.pdf
    • https://static.usrfiles.com/ugd/8acad3_c396b6190a2040dfa72bd3d65691caf6.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_off00007906.bin
12253e9e4be0c571d5bbc5d017c9e4a274828a8833ba0ab80698dccd057ae3ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7906 5176 bytes
font_01_sfnt_off00008a78.bin
cde184c0f77103ac28484f566f2fc45ec606cb74e457eb573f2c3a77ec955564		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A78 13404 bytes
font_02_sfnt_off0000b4d6.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D6 4324 bytes

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