Malicious PDF — malware analysis report

Static analysis result for SHA-256 42691806e0edd2f0…

MALICIOUS

PDF

41.3 KB Created: 2020-09-04 01:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a127b73f06eb9d0f86784f8c2e21fe66 SHA-1: d32c9bb13966cd96eb046f6fcdb13b29fa8551c1 SHA-256: 42691806e0edd2f03b2a7640e05924434bb505acdcaeba784d2158a0aac1af4a
150 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains text related to 'Puzzledom box answers' and the malicious URL, suggesting a lure to a scam or phishing site. The PDF also hosts a large number of external links, many pointing to benign content, but the presence of the malicious redirector is the primary indicator of malicious intent.

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=puzzledom+box+answers
    • https://static.usrfiles.com/ugd/7a11b0_06302d3d5182445f87d4e9a5cb496ba6.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a5f92b248f644aebb64990e07b4a0b4.pdf
    • https://static.usrfiles.com/ugd/e2f197_fda8036a88844276a1c58e6903026b72.pdf
    • https://static.usrfiles.com/ugd/a107db_95bf3d702fc04a25ba6d3593b2976d77.pdf
    • https://static.usrfiles.com/ugd/2ac701_f6680c51799a406caa1473a3ba6a412e.pdf
    • https://static.usrfiles.com/ugd/b8c837_96f1f79f01ab40d9b0803742480f2cd7.pdf
    • https://static.usrfiles.com/ugd/1813b3_645724f152f24d0da1654e7273ede4e1.pdf
    • https://static.usrfiles.com/ugd/b50c55_afb71a3275e2406aa0e651e729572463.pdf
    • https://static.usrfiles.com/ugd/2c608b_64a408bdc87e47b689f094bee0a29180.pdf
    • https://static.usrfiles.com/ugd/3649d2_26496454a15346aab75499a6fe6f2662.pdf
    • https://cdn.shopify.com/s/files/1/0464/6495/8616/files/62397177787.pdf
    • https://cdn.shopify.com/s/files/1/0436/7358/3781/files/kuttymovies_2019_tamil_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/leche_alpura_contaminada.pdf
    • https://cdn.shopify.com/s/files/1/0433/3430/3912/files/salesforce_interview_questions_and_answers_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0439/2747/0235/files/boss_telugu_movie_songs_naa_songs.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_off00006317.bin
67356a67ef738c692e7722a62a54ca59da8a2cde275a43d497a4191a6baaa75e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6317 5324 bytes
font_01_sfnt_off0000752c.bin
9accce896ee8066c67a6abe866704e3fd0b3e9df08725a663b0a650062280b93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x752C 10352 bytes

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