Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d34e3e6f2945aba…

MALICIOUS

PDF

50.3 KB Created: 2020-08-30 15:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c32008e16104bb7d6b5abe5d0f02fa80 SHA-1: 8111bf04ba13025352795127f31d21561fd58c3b SHA-256: 9d34e3e6f2945aba9321b77837f28ba397fd89551465e09ccdd4bfd334655e68
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is disguised as educational content. The PDF also features a link farm pointing to numerous other PDFs, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL confirms the intent to lead the user to a harmful site.

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.cc/wix?keyword=exercices+cm1+droites+parall%25C3%25A8le
    • https://cdn.shopify.com/s/files/1/0432/8777/3342/files/sukuzaxabonemivumixan.pdf
    • https://cdn.shopify.com/s/files/1/0466/2552/1829/files/emea_guideline_for_genotoxic_impurities.pdf
    • https://cdn.shopify.com/s/files/1/0428/8489/0790/files/myth_and_meaning_cracking_the_code_of_culture_pdf.pdf
    • https://static.usrfiles.com/ugd/b8c837_4dae6cf70624488d80d3fba796d71520.pdf
    • https://static.usrfiles.com/ugd/b8c837_963a1f0ead924d0b943671f60847e9cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d9ffaeceb504c518a6638ab40a23277.pdf
    • https://cdn.shopify.com/s/files/1/0431/8806/0320/files/85839505134.pdf
    • https://cdn.shopify.com/s/files/1/0433/7287/1832/files/rewewinefan.pdf
    • https://cdn.shopify.com/s/files/1/0428/5323/6902/files/36986858895.pdf
    • https://cdn.shopify.com/s/files/1/0432/0237/9939/files/distinction_between_assessment_for_learning_and_assessment_of_learning.pdf
    • https://cdn.shopify.com/s/files/1/0447/8484/4949/files/42744704916.pdf
    • https://cdn.shopify.com/s/files/1/0434/5053/2001/files/pufomuk.pdf
    • https://cdn.shopify.com/s/files/1/0464/5493/1624/files/nimibugodukinazugibubuvir.pdf
    • https://cdn.shopify.com/s/files/1/0437/1503/5290/files/jalodimepoworaxatofenu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7816/3359/files/measuring_brand_equity_across_products_and_markets.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_off00006c3e.bin
621123cbf412d41177e544758bde8915e00f8c6d7261607790169361e17632f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3E 5436 bytes
font_01_sfnt_off00007e68.bin
b93ea17567294f4d4152053b462d400e89f6496a849b6b113bc3f6f9e7be496c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E68 11644 bytes
font_02_sfnt_off0000a3cb.bin
0e8f0d2e150166c07e1f1f9dea5b840712ddc624e286be9fa9b2cf0989a436bf
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3CB 16424 bytes