Malicious PDF — malware analysis report

Static analysis result for SHA-256 a73934ca9d3d939a…

MALICIOUS

PDF

52.1 KB Created: 2020-08-15 22:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d119e4b1ea4226092cee25f76786506 SHA-1: 5a8fd11ca245bcc3d4174df0f23dcf14dead90d7 SHA-256: a73934ca9d3d939aa0d05ef63cdae9d7a72a1cd8f4ba976d8b928d594aa88619
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to SEO poison and redirect users to malicious infrastructure. The primary malicious URL is https://ttraff.com/wb?keyword=khandana%20bhava%20bandhana%20lyrics%20pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links to PDF files hosted on various domains, suggesting a lure to download further malicious content or visit phishing sites.

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/wb?keyword=khandana%20bhava%20bandhana%20lyrics%20pdf
    • http://files.worksoffreedom.com/uploads/1/3/1/4/131482968/xezifadawewopazu.pdf
    • http://files.nubblelightstore.com/uploads/1/3/1/4/131437725/jewadebix.pdf
    • http://rewojurem.easternshorechess.org/uploads/1/3/1/3/131383790/6474598.pdf
    • http://files.waverlybc.net/uploads/1/3/1/1/131164431/xuzetezazu_fopevezago.pdf
    • http://files.danielleozymandias.com/uploads/1/3/2/6/132681488/tibodegawuka-kupedisiwok-sajixo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0361/6165/files/taiwan_visa_application_form_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/52929841292.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2821/files/76405830992.pdf
    • https://cdn.shopify.com/s/files/1/0435/4569/0266/files/16138270931.pdf
    • https://cdn.shopify.com/s/files/1/0432/1630/6344/files/zukarixojojuse.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/basugogigarerebid.pdf
    • https://cdn.shopify.com/s/files/1/0437/7634/4225/files/tamil_movie_video_songs_hdvidz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bc4.bin
284d3239c5c2a4f9156e39789fb358cd5cce06c0056f7e15e30ebdd98321628e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC4 5516 bytes
font_01_sfnt_off00007e76.bin
c3f200930c856491ce11dc9671741496955b8b81c249cb70476a346ede0910f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E76 7292 bytes
font_02_sfnt_off000095d5.bin
a8f0ff3ba6aabdc1f02d0572cd7288b1f6d06c23c368710a7c9313d97f58b4c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95D5 15472 bytes

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