Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aa13faa46269606…

MALICIOUS

PDF

39.2 KB Created: 2020-09-03 02:36:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20384e377a5d367b58e66d10b73ba835 SHA-1: 2c9f826a73537e4dffa0cdc376aa1a0175e78921 SHA-256: 4aa13faa46269606001f87a566fef4d59ef9091c359ab9524d149e26756f20fe
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=artistic+template+for+powerpoint', which is also flagged as malicious. This suggests the PDF is designed to redirect users to malicious content, likely for phishing or malware distribution.

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=artistic+template+for+powerpoint
    • https://static.usrfiles.com/ugd/12f4eb_b8bd9c3fca144c478b640c9fe6611ea6.pdf
    • https://static.usrfiles.com/ugd/5cd33b_513db71e8b3d482089ac71ba1c6cfed5.pdf
    • https://static.usrfiles.com/ugd/32acb1_4ad8671010654ab2b2b376c2ff4bdbfe.pdf
    • https://cdn.shopify.com/s/files/1/0433/8044/1238/files/82595911614.pdf
    • https://static.usrfiles.com/ugd/18ee90_1dfcb7071b6e47049d5de4f177e660d9.pdf
    • https://static.usrfiles.com/ugd/eb6612_6de747acfe3546078e0c7beeec9d7f12.pdf
    • https://static.usrfiles.com/ugd/9d869b_355677e03e474aff90beb26cf9434bf2.pdf
    • https://cdn.shopify.com/s/files/1/0437/9728/2977/files/tecvid_kurallar_zet.pdf
    • https://cdn.shopify.com/s/files/1/0432/2597/2904/files/nimiwamivix.pdf
    • https://cdn.shopify.com/s/files/1/0435/7259/2801/files/gintama_season_1.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_off00005cfd.bin
e6ee4df5d89a00cd358ef3089d7748cdbc20ba36bf95b5f4179c0e3d83193ce7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFD 5240 bytes
font_01_sfnt_off00006eca.bin
f4a057e0dc336eeaa54dc9cc4218c8069720f202ba5fe1d464bd58bd61a30b07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECA 9796 bytes

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