Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df6aa66679cb3b5…

MALICIOUS

PDF

41.5 KB Created: 2020-10-19 08:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8175387830185e7febd9d115f0be507 SHA-1: 83158b210a8931fc8602933159809ff0ddc0728b SHA-256: 9df6aa66679cb3b5b73b7a2c8886886a0715093b86c9e8a867257358af1f1e18
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDFs, indicating a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.me, which is likely the primary payload delivery mechanism. The document body, though heavily obfuscated, contains the target URL, reinforcing the 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/123?keyword=qld+health+sepsis+guidelines
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/jubumirigop_genijijuris_wasezele.pdf
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/kuwekewugi.pdf
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/givaguvisen.pdf
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/b36379370a.pdf
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/modeg.pdf
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/xivuleko_sudumiza_guvimopixuxew.pdf
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/ff99ac73571.pdf
    • https://xozanazefozi.weebly.com/uploads/1/3/0/8/130874019/d2c201.pdf
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/xojajuv-mitegejitokuxig.pdf
    • https://uploads.strikinglycdn.com/files/5d018a3f-1c24-4d53-a48f-9ce56dba54e9/69918740175.pdf
    • https://uploads.strikinglycdn.com/files/1b4086fe-0e09-4208-987f-b9a099ee619f/gentlemen_of_the_row_v1._9._2.pdf
    • https://uploads.strikinglycdn.com/files/8e0c46a9-a4fc-45aa-97b2-1fcf58708ff0/senijefip.pdf
    • https://uploads.strikinglycdn.com/files/95b65567-5c1c-4ab2-88ab-8bd124e9de2d/28309867609.pdf
    • https://uploads.strikinglycdn.com/files/ea066aaf-18b2-4716-aaab-bf74f2f5d612/62985925221.pdf
    • https://cdn.shopify.com/s/files/1/0430/8215/4135/files/76662655877.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/sex_linked_pedigree_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0502/9661/9193/files/41168991493.pdf
    • https://cdn.shopify.com/s/files/1/0501/0794/1027/files/dynamics_of_machinery_vibration.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_off000064ba.bin
48e9ebfa18e482b7fb2c3d5918b67473e84730c5d333bfdad00d0a37552343d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x64BA 5184 bytes
font_01_sfnt_off00007656.bin
84f9d21b6fb92151d740c6c7cbcbf9d4771589ca5a65cc59391893f902cb60c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7656 10020 bytes