Malicious PDF — malware analysis report

Static analysis result for SHA-256 af09b2a0e1fe0680…

MALICIOUS

PDF

50.9 KB Created: 2020-09-11 19:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5715b7850905e415fecd582fabd6afdd SHA-1: 8c1745ceb1db42a9367fc1d528c1ff5fb3267230 SHA-256: af09b2a0e1fe068051c1f6cbd0da3cf78d02d780aa63b1e08f54b37bcfe89025
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.club/wix?keyword=denim+jacket+style+guide`. This URL is embedded within the document body, suggesting a social engineering lure. The file also contains a large number of external PDF links, many hosted on `static.usrfiles.com`, which is flagged as a link farm. While some of these links are benign, the primary redirector is malicious, indicating the document's purpose is to lead the user to harmful content.

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=denim+jacket+style+guide
    • http://sozafo.lindagreenup.com/uploads/1/3/0/8/130873851/fa6de.pdf
    • http://fexufosuj.mrsapedersen.com/uploads/1/3/1/3/131398406/xixapaxud.pdf
    • https://static.usrfiles.com/ugd/0047a4_e883954b79be41cea92260dad765bf8b.pdf
    • https://static.usrfiles.com/ugd/895bef_0be8fa15ee5e43fa8a15cb37b6feeb5a.pdf
    • https://static.usrfiles.com/ugd/b65acf_d4699ad333074e97bd2dbeff85d204ee.pdf
    • https://static.usrfiles.com/ugd/f4de5e_20090cbe28b644189974b2001befc563.pdf
    • https://static.usrfiles.com/ugd/3e5db3_ba46d4cbfb90411489cd6aaeb5f7b3bb.pdf
    • https://static.usrfiles.com/ugd/8ac1ab_991d34823500410c9cabdac57c901d97.pdf
    • https://static.usrfiles.com/ugd/0baf77_81313ea6bf7942ee8ab115e984986a7f.pdf
    • https://static.usrfiles.com/ugd/0af078_a981a39b703f4713b9faf69b5543a0b4.pdf
    • https://static.usrfiles.com/ugd/7a7fb1_713f9963fda6443dac594d8ddf0e150a.pdf
    • https://static.usrfiles.com/ugd/40512e_f1837455c57b45519f92cf99ca90b75d.pdf
    • https://static.usrfiles.com/ugd/3e9e83_c30d983f9d3c4fc3ac8c67297d0dbdcf.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_off00007cab.bin
08c539d616d83eec421d12a398b021fed63ccb7d7709a648db06d67c038ccc65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAB 5176 bytes
font_01_sfnt_off00008e41.bin
a32da9d873318920d73c42b31ea8b2ddcf3fa0f9ff2e237b521595b9f75369d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E41 10120 bytes
font_02_sfnt_off0000b0e4.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E4 4324 bytes

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