Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ef121efcc7f0f8…

MALICIOUS

PDF

45.1 KB Created: 2020-09-03 16:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a493116774f768ee8232cd746464d39 SHA-1: df01d620e5e62f38b2133e2f995d85983b6e9040 SHA-256: e6ef121efcc7f0f88dd8164e84632282f79b8b23b2e2e03820b1ff026d2199a2
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.me/wix?keyword=acrylic+polymers+in+primary+forms'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the same malicious URL and references to other PDF files, suggesting a lure to external malicious content.

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/wix?keyword=acrylic+polymers+in+primary+forms
    • https://static.usrfiles.com/ugd/79cb75_222c35377a3f4bada07abd159c5c9ea7.pdf
    • https://static.usrfiles.com/ugd/98d639_4d7afde50d184e138cbe09fa4d5c9a5e.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_b90c25a552c44a1d95c44ff1c2c0e162.pdf
    • https://static.usrfiles.com/ugd/b8c837_f4f5f3787226410ea63105508b12721c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5f0a7616f2c4122a05a0dc4150c0a8c.pdf
    • https://static.usrfiles.com/ugd/89064d_757a8fcd89ca4afaa8132fd9a7d027c0.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_011c962d118748dc91d24868a15e9f54.pdf
    • https://cdn.shopify.com/s/files/1/0435/1990/1850/files/wuribexalemawejulipodabir.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6575/files/jokab.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/34073437825.pdf
    • https://cdn.shopify.com/s/files/1/0432/4386/4228/files/zuzomewefofelabuzekifuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/5416/1310/files/surgeon_simulator_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7448/files/lamawelogunikofoje.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5395/files/varobamub.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_off00007316.bin
7b36e0dd9f17ebe1739f4b18c16a1ef181e2639493dc22d0c2b8b10d99840602		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7316 5252 bytes
font_01_sfnt_off000084e9.bin
8893403d006ea68e41917d74fff3c02a69d9f7caabaa5acbadf190c9dc974936		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84E9 10004 bytes

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