Malicious PDF — malware analysis report

Static analysis result for SHA-256 c354a0249762103b…

MALICIOUS

PDF

45.5 KB Created: 2020-08-10 14:50:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0fcdde981f7cad8ea1863b3940cf9b3 SHA-1: 498d65213412dbb6a63beaefdc4a97ad61f2ce93 SHA-256: c354a0249762103b0495620ce4f11b3b864e3986623c3c2b1a1553a948d2a89a
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=ugc+net+eligibility+pdf'. The document body, though heavily obfuscated, also contains this URL and other links pointing to Shopify domains, suggesting a link farm used to obscure the true malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=ugc+net+eligibility+pdf
    • http://files.dellsstp.com/uploads/1/3/1/3/131382595/9808037.pdf
    • http://files.ohioproperservice.com/uploads/1/3/2/6/132695694/8371137.pdf
    • http://migemexo.wellplannedadventures.com/uploads/1/3/1/0/131071164/2527523.pdf
    • http://files.arijadehairandmakeup.com/uploads/1/3/1/4/131483108/nesowopemiso.pdf
    • https://cdn.shopify.com/s/files/1/0436/1184/8861/files/proceso_de_enseanza_aprendizaje_del_idioma_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0429/3437/0470/files/vutubo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3120/files/basic_chemical_formulas_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lejozusuxawunulimedobina.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/61406012472.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/89596665725.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/games_for_business_and_economics_roy_gardner.pdf
    • https://cdn.shopify.com/s/files/1/0449/4455/6187/files/21470907731.pdf
    • https://cdn.shopify.com/s/files/1/0435/6050/1407/files/kamunanupibepuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/miveguxuxububepevomozit.pdf
    • https://cdn.shopify.com/s/files/1/0431/0014/3770/files/ubuntu_init_d.pdf
    • https://cdn.shopify.com/s/files/1/0429/9227/1519/files/vaguzebolesosexab.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_off00005f84.bin
61db054ccaf5bc887409125d6d050c8351516bb907519689fcbd13a2f18fa611
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F84 5072 bytes
font_01_sfnt_off000070de.bin
76e3eaa839aabf9895a470a222b8f2003bb81cc3d9b8c7bf4d58caf1b92adb11
pdf-font-stream PDF embedded font (sfnt) at offset 0x70DE 10232 bytes
font_02_sfnt_off000093e4.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
pdf-font-stream PDF embedded font (sfnt) at offset 0x93E4 16164 bytes