Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d4c49c4d26a24cc…

MALICIOUS

PDF

41.0 KB Created: 2020-09-02 06:40:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac96a9d9e286a700ac7007df243249a8 SHA-1: 81d9f24a00484af6b607bed2824a28f7a1433812 SHA-256: 2d4c49c4d26a24cc38597af291313100e96633fbfa0c4e7fcc2370c07b02197e
150 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains text related to creating Google Forms for exams, suggesting a social engineering lure. The presence of a large number of external PDF links further indicates a link farm designed to attract traffic or manipulate search engine results.

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=cara+membuat+google+form+untuk+ujian
    • https://static.usrfiles.com/ugd/b8c837_b524e3e52823497fb1243a0ed86b36d1.pdf
    • https://static.usrfiles.com/ugd/d1d005_ddd6164be4034419a1b316634d9ef6e1.pdf
    • https://static.usrfiles.com/ugd/9d66c7_cdbc46c79b4f4c4d897e14cb2f7aac34.pdf
    • https://static.usrfiles.com/ugd/ecd213_318d1b7ea62c4428befd01840adb13cb.pdf
    • https://static.usrfiles.com/ugd/08fe48_0e9b14d3a1044cb1ad1e9fe2a2ad79aa.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_236559f3d58b474a8026aea22222045a.pdf
    • https://static.usrfiles.com/ugd/7d21c0_1a591053e4994dcfa74d8e8039869c15.pdf
    • https://static.usrfiles.com/ugd/fdd6c2_6e62388d421c461e82bb9651cac49392.pdf
    • https://static.usrfiles.com/ugd/63d3ad_01ba744676a049018f9905ba63129b2e.pdf
    • https://cdn.shopify.com/s/files/1/0433/6127/1959/files/66030554014.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/3d_audio_songs_djmaza.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/62476037306.pdf
    • https://cdn.shopify.com/s/files/1/0468/8786/2429/files/dofurijulibag.pdf
    • https://cdn.shopify.com/s/files/1/0434/1586/3463/files/file_manager_pro_apkpure.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_off00006401.bin
81dc342a299dfc64c8efa735bfde209efed4619240881dc06e8c673baedeb9ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6401 5096 bytes
font_01_sfnt_off0000754e.bin
8c335b111585b10ea860dfbbbe1995fd58925b757a11bf27234b0ba2ef024666		 pdf-font-stream PDF embedded font (sfnt) at offset 0x754E 10052 bytes

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