Malicious PDF — malware analysis report

Static analysis result for SHA-256 862e0ee551050fbf…

MALICIOUS

PDF

43.3 KB Created: 2020-08-10 17:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b67c1f610e5aa20e6e1d112eee06941c SHA-1: 2e7ae1b1e942bae1572c48e42c1b35c5549e578e SHA-256: 862e0ee551050fbf876adc0b73e1deee489e7cf4a39e57196537997e941db304
150 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=acca+f6+notes+2020+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to URLs and appears to be part of a link farm strategy to improve search engine ranking for malicious content.

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.ru/pify?keyword=acca+f6+notes+2020+pdf
    • http://files.evemarieshahoian.com/uploads/1/3/1/3/131398504/2015596.pdf
    • http://files.imagesbylesrigby.com/uploads/1/3/1/6/131606815/2137416.pdf
    • http://files.lulingicehousepottery.com/uploads/1/3/0/7/130740069/dabevafovitagufob.pdf
    • http://lumujirel.lesbiandiscussiongroup.com/uploads/1/3/0/7/130738914/415892.pdf
    • http://files.theburyingparty.com/uploads/1/3/0/7/130740255/pedezowarita_kusenavilojoxok.pdf
    • https://cdn.shopify.com/s/files/1/0431/5391/6053/files/75784557513.pdf
    • https://cdn.shopify.com/s/files/1/0428/7833/7187/files/vemozemuramemep.pdf
    • https://cdn.shopify.com/s/files/1/0435/9208/9759/files/45794286264.pdf
    • https://cdn.shopify.com/s/files/1/0438/6881/5528/files/mahalaxmi_calendar_march_2020_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3997/1738/files/articulo_cientifico_cancer_de_prostata.pdf
    • https://cdn.shopify.com/s/files/1/0431/2278/6466/files/ielts_speaking_topics_with_answers_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/6103/5686/files/business_law_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/2042/5115/files/panaverafefemilo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/walubikafesivu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1575/files/2040640927.pdf
    • https://cdn.shopify.com/s/files/1/0431/6125/6091/files/patawidexoleguzotigu.pdf
    • https://cdn.shopify.com/s/files/1/0447/0633/2825/files/williams_exercises_for_back_pain.pdf
    • https://cdn.shopify.com/s/files/1/0429/6802/3194/files/towitegotubujovatiketapa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/gre_vocabulary_list.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_off00006a22.bin
a814ba7b1e72338d5eba72bcbf2ed92571d205645757065d602fea303a500511
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A22 5436 bytes
font_01_sfnt_off00007ca9.bin
5707f5a7adc0fab942f6b74de28ad04e51c284ecc25d6ce36bdf79972f001ca9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA9 10312 bytes