Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d6c23d126b8912c…

MALICIOUS

PDF

44.7 KB Created: 2020-08-29 09:06:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 541b084a7f6139ce15ef53f3759513a4 SHA-1: b8e0f24f38a4f5e79a7265356f2513d6b8256f58 SHA-256: 4d6c23d126b8912ca72f0f8f58cab605a5f97a06f3d8dbeda4335e2935aa0969
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=java+document+formatter+vscode'. This URL is presented within the document body, likely as a lure to trick users into clicking it. The presence of numerous other PDF links, though marked as benign, suggests a link farm or SEO poisoning tactic. The document's content and structure indicate a social engineering attempt to direct users to malicious infrastructure.

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.
  • 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.
  • 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.cc/wix?keyword=java+document+formatter+vscode
    • https://cdn.shopify.com/s/files/1/0438/1910/6461/files/motorola_bluetooth_n136_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/4235/5865/files/gosinovi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6766/9654/files/audi_a4_2016_manual_transmission.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/45917472372.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/beriziluda.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/7001213131.pdf
    • https://static.usrfiles.com/ugd/b8c837_053c0258328d466fb7a69ceb52b4bdd0.pdf
    • https://static.usrfiles.com/ugd/b8c837_470e11c826a442f0ab865352db2ba501.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3adabb3da63441b94fc10baf91845ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_87458f3efb3744c78231bbfa0f50a625.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006133.bin
adb3bfe353f765d34ad8eaaf86149d711492f2f88570db09cc1c750026da7f3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6133 5020 bytes
font_01_sfnt_off00007224.bin
3c35048563349562cbb114acc275be6fe808ff2a4195576506cbc96d5a309d0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7224 10756 bytes
font_02_sfnt_off00009693.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9693 4324 bytes

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