Malicious PDF — malware analysis report

Static analysis result for SHA-256 b845fa859b94a61d…

MALICIOUS

PDF

41.4 KB Created: 2020-08-31 21:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01784cc595977eabba9b71b5df19cdd9 SHA-1: facfc6ae10447523378d3bc5836297d481f76bef SHA-256: b845fa859b94a61d0549057a080bbdf7c1a025cecc2d7a9d69a2a0de66c01cdc
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'css layout templates tutorial' and the malicious URL, suggesting a lure. The presence of a malicious redirector indicates an attempt to lead the user to a compromised or malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/pify?keyword=css+layout+templates+tutorial
    • https://static.usrfiles.com/ugd/429b25_550c8f0b7981422883286198e812d5b7.pdf
    • https://static.usrfiles.com/ugd/9ec29b_63c2cb7c9b9e4899ab24aa4575fc3e2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_c07078fac9d04a0caddf1b60a8167997.pdf
    • https://static.usrfiles.com/ugd/b8c837_96b525a2971e46f187e573606558a986.pdf
    • https://static.usrfiles.com/ugd/a2e20a_f1c2ceea87d2490a97d2bb4372bc911e.pdf
    • https://static.usrfiles.com/ugd/b8c837_0444f4670e5641759cd886d5c46e78c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_da67616249a94069aded818778114e0a.pdf
    • https://static.usrfiles.com/ugd/74e905_1bf01265a7de4ac78c0ea0c0996b860b.pdf
    • https://static.usrfiles.com/ugd/05900a_9be6949cd2f04de5aff4213b709a2257.pdf
    • https://static.usrfiles.com/ugd/865d50_429e5413f94f4f248adf508112f0fa3a.pdf
    • https://cdn.shopify.com/s/files/1/0429/5481/7690/files/25340732082.pdf
    • https://cdn.shopify.com/s/files/1/0431/8927/2725/files/xirum.pdf
    • https://cdn.shopify.com/s/files/1/0462/4252/9429/files/digital_platforms_inquiry_preliminary_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/tendinitis_banda_iliotibial.pdf
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/nuxinotiremolitarasubum.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_off000063c0.bin
6fa2c0b2f4f5b76342dbaaab9cfdc4f04945b90063ee396147ccd500a22b9445		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C0 4972 bytes
font_01_sfnt_off00007494.bin
262e703706a5882e3c5f9cbeafd673bf6a44303e082578f8ea0330afb3f75f36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7494 10768 bytes

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