Malicious PDF — malware analysis report

Static analysis result for SHA-256 892a767f441713ef…

MALICIOUS

PDF

42.8 KB Created: 2020-08-31 04:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65601d90bf9b82e7476dde78ec5dbd95 SHA-1: 1b21cf4e38b2618655486425c7a41ed32b4c45e8 SHA-256: 892a767f441713ef1ed73a4f3d4c8f1489e522e149f5cf4ce78aa9042cc9bc9e
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to a URL that appears to be a software keygen activator. The document body, though heavily obfuscated, contains references to the same URL and software names. The presence of numerous external links, many hosted on Shopify, suggests a link farm designed to distribute malicious content or engage in SEO poisoning. The primary malicious IOC is the redirector URL.

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.club/wix?keyword=autodesk+autocad+2020+x-force+keygen+activator
    • https://cdn.shopify.com/s/files/1/0430/7451/9194/files/morphology_of_fungi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5312/files/82414397436.pdf
    • https://cdn.shopify.com/s/files/1/0437/7808/0919/files/15629551497.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/miboji.pdf
    • https://cdn.shopify.com/s/files/1/0430/8067/9577/files/79619632799.pdf
    • https://cdn.shopify.com/s/files/1/0432/7496/1059/files/43859691828.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52665001447.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/zopibelaniwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3184/6296/files/99735613507.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/libidurekatomanazavevufi.pdf
    • https://static.usrfiles.com/ugd/c0b427_8251016a81704f0db3d83180fc3c91ba.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_47962efc23174f3fabc0438d9bf5678f.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_off00006544.bin
0535c5cb75dd9f760b06eadad066674c67e798124c475a4415a90e9a2da5c890		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6544 5748 bytes
font_01_sfnt_off00007904.bin
e3ba61abcaf3d99a0776f80aebecf53b1e06ed892f8537b3769c5ed1cae4fdc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7904 11080 bytes

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