Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1a36dc3e2459b47…

MALICIOUS

PDF

43.1 KB Created: 2020-09-01 03:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdbfcba3851b042a3279be8e44d66f3a SHA-1: 7861010366c53b9f6ec95208a66451a92c8316f3 SHA-256: a1a36dc3e2459b47f9931358899b89ee63f367a92e8dbda4e18c63d6e8ea91bd
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a "Windows 10 pro activator" lure. The document body, though heavily obfuscated, contains a similar URL. The PDF also contains a large number of embedded links, many hosted on Shopify, suggesting a link farm for SEO poisoning or traffic redirection. The primary malicious URL is https://ttraff.com/wix?keyword=windows+10+pro+activator.

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=windows+10+pro+activator
    • https://cdn.shopify.com/s/files/1/0432/0509/9675/files/streaming_video_recorder_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0428/3426/4220/files/z_notes_chemistry_a_level.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/dazasemalivumezatugav.pdf
    • https://cdn.shopify.com/s/files/1/0430/4073/5381/files/18653888788.pdf
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/webedudenopum.pdf
    • https://static.usrfiles.com/ugd/cafc24_eb6773f65f8a4cccba4c0955991c1f05.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6ce80e4b3e54e749dac929f971fd47d.pdf
    • https://static.usrfiles.com/ugd/895bef_611546e3c5524866803cbe5abec40298.pdf
    • https://static.usrfiles.com/ugd/912de2_bfe307f327f6466c9a73709d173bfde8.pdf
    • https://static.usrfiles.com/ugd/136d07_304ad6b3b92b4476a562ababe5d614d0.pdf
    • https://cdn.shopify.com/s/files/1/0429/5727/5299/files/tekifuwegabiruzimo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9503/8877/files/35564116722.pdf
    • https://cdn.shopify.com/s/files/1/0447/5686/1077/files/rules_by_cynthia_lord_free.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_off00005dec.bin
c8afde7fff95163749007c11921747cb3b470e8f09cc2c898a4cf54408627bb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEC 5396 bytes
font_01_sfnt_off00007075.bin
5eeae0dd75798594d045cb6f7ddab34177bfaaffd1209fdce7f38517f9c8e2b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7075 15312 bytes

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