Malicious PDF — malware analysis report

Static analysis result for SHA-256 497010a6395805e4…

MALICIOUS

PDF

34.7 KB Created: 2020-08-30 08:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1711449777f2fcd296b78cbea66cdf5 SHA-1: ca50928c75ff0f69d9e92f71e2a5e86709eddb45 SHA-256: 497010a6395805e43ff78bbae89d6432414933878870a0401c9b769b8e9c202e
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, forming a link farm. One of these links, 'https://ttraff.com/wix?keyword=la+m%25C3%25A9thode+simple+pour+en+finir+avec', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL and other links to PDFs hosted on static.usrfiles.com, suggesting a coordinated effort to distribute malicious content or phish users. The ML classifier strongly supports the malicious verdict.

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.com/wix?keyword=la+m%25C3%25A9thode+simple+pour+en+finir+avec
    • https://static.usrfiles.com/ugd/12f4eb_cb335aa82c804c3b87684be229a99f37.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd134cce73ed48b3b14e5292415ba184.pdf
    • https://static.usrfiles.com/ugd/fa6f14_a8f083c2c1df4b5c95aedd95f97f62a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_121f57f7445a4b548cddd94bf27bbc0d.pdf
    • https://cdn.shopify.com/s/files/1/0429/0553/4620/files/2_states_book.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd30a3165401484da617c59abe85d728.pdf
    • https://static.usrfiles.com/ugd/43d598_060c370ce62e4d5686cdd1581c1f5112.pdf
    • https://static.usrfiles.com/ugd/b8c837_2cce5fc364844c828ead48127fa3a40c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bb3d96d2c654f6f813b4d0e36dd2f4c.pdf
    • https://static.usrfiles.com/ugd/432b07_5cd80702dd484381b1b5e72e63cc6222.pdf
    • https://static.usrfiles.com/ugd/5899d5_6c4676add56340b89289130794bc2dac.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_off000044c6.bin
54dfd139a0004e47aab67a60194c6e049f7bffaf0f655d64febe3b6f798f9a20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44C6 5540 bytes
font_01_sfnt_off0000573a.bin
439bc68935572d836f32ba6b7bd5e2ee96f1954e3c7308596d8f5682c4b7ffe9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x573A 12216 bytes

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