Malicious PDF — malware analysis report

Static analysis result for SHA-256 af48c803aeaa2625…

MALICIOUS

PDF

42.8 KB Created: 2020-09-08 23:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04c7ac9115d314d6d4bcccca57e222e0 SHA-1: af3010c38ac49a3c35b94d677900c74d6b6725fe SHA-256: af48c803aeaa2625e12064054e68cd9649e9bd3453f82e325e9df16dffd06db3
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://ttraff.club/wix?keyword=pga+value+guide'. This indicates an attempt to lure the user to a potentially harmful website. The PDF also exhibits characteristics of a link farm, embedding numerous external links, many of which point to 'static.usrfiles.com'. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

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.club/wix?keyword=pga+value+guide
    • https://static.usrfiles.com/ugd/8ebb60_14d68c168d15495ba81ee74520505425.pdf
    • https://static.usrfiles.com/ugd/aec2ea_c6384b15ec10464bbce36612527105fe.pdf
    • https://static.usrfiles.com/ugd/af0aa9_84205ff3cdc44b19a95ce43db07cbea5.pdf
    • https://static.usrfiles.com/ugd/6dcf04_360b594a8eaf4badb9f4682faedd079c.pdf
    • https://static.usrfiles.com/ugd/516574_ac4159938c5d4becba878c75e5733e27.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa60f998f3ca46a0a3a5118adb8edc6e.pdf
    • https://static.usrfiles.com/ugd/0286dd_5e81d032fb0d43e2b8a9693bfceb22f8.pdf
    • https://static.usrfiles.com/ugd/d54300_9f404186dab440c8a7ac2b7eeda2d2d8.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/dawedavatajad.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/facial_recognition_app_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/31563214146.pdf
    • https://cdn.shopify.com/s/files/1/0431/5827/4205/files/alfabeto_hebreo_manuscrito.pdf
    • https://cdn.shopify.com/s/files/1/0462/2771/8293/files/1566432315.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_off00006917.bin
cd267d4f250504c8425291149be7a0a82a2780ac439e18fb8a21a52f941023f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6917 4780 bytes
font_01_sfnt_off00007976.bin
e6d5a6a15b17e77f65cadaa7fa3908d9e900cf3f5d9712814bfa2d348bbc2dc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7976 10992 bytes

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