Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfbcadd356eec3e1…

MALICIOUS

PDF

46.1 KB Created: 2020-08-01 18:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdfb2c6388266deb5e1419761c3aa310 SHA-1: d2c4e5ca92b426721cff73e0d14a3ce3a5686093 SHA-256: bfbcadd356eec3e1ade14be1148bb840909753b4990f4edfb796f5ccb24626c3
160 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL is https://ttraff.com/pify?keyword=git+using+proxy, which likely serves as a gateway to further malicious content. The presence of a visible LOLBin command execution instruction suggests the PDF is designed to execute commands or scripts upon interaction, further supporting the malicious intent.

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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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/pify?keyword=git+using+proxy
    • http://files.brjcdac.org/uploads/1/3/1/6/131637723/78fe5.pdf
    • http://files.blackdogfabrication.com/uploads/1/3/1/3/131379312/658e5bcc5d81.pdf
    • http://files.donegalfoundation.org/uploads/1/3/2/7/132712369/aa1deda259c67.pdf
    • http://files.oliverwellnessandmassage.com/uploads/1/3/0/7/130776223/3207052.pdf
    • http://files.rioxpvista.com/uploads/1/3/1/6/131637034/36c763c9765.pdf
    • https://cdn.shopify.com/s/files/1/0433/7932/7130/files/jasupumozedar.pdf
    • https://cdn.shopify.com/s/files/1/0432/3518/0703/files/14668242231.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/kitujezorugarusazamu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2814/3510/files/xeniwumesufimutep.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4441/files/you_are_a_pirate_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/6553/1806/files/48583715132.pdf
    • https://cdn.shopify.com/s/files/1/0429/1179/3315/files/fetomomawapexiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/8145/6023/files/wget_from_github.pdf
    • https://cdn.shopify.com/s/files/1/0431/9028/8541/files/nemewol.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/sepifudikego.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_off000075cf.bin
d6e9f0a0a30c7c71e05117dc3e93144bf7625369e6da8e3c7af558bff5457dc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75CF 4948 bytes
font_01_sfnt_off000086ca.bin
8f8e8c30caa4cbda978f86f2bc58402e6d6b3f467e90e9efe633a23417ecf504		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86CA 10860 bytes

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