Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f4db006f8120671…

MALICIOUS

PDF

44.2 KB Created: 2020-09-07 09:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01f7bb3ce73b93ff9ad24501d33aad51 SHA-1: 1f30c86480eb6b82bb74232524f908fe142f859c SHA-256: 2f4db006f81206713048b9d70193c793f95afbd39d1b6b48b075ea84f5e03a7d
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 a link farm hosted on static.usrfiles.com. One of these links, ttraff.com, is identified as a malicious redirector. The document body is heavily obfuscated but appears to contain metadata related to the creation of the PDF, including the URL that initiated the process. No scripts were extracted from this sample.

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/wix?keyword=alisha+chinai+albums
    • https://static.usrfiles.com/ugd/b8c837_1d010525a98245c69b793f0c62bd073f.pdf
    • https://static.usrfiles.com/ugd/6fd45c_c33298973e014567babdcfab09a46aad.pdf
    • https://static.usrfiles.com/ugd/a107db_f8aab90384c847968d1df991dd607a1b.pdf
    • https://static.usrfiles.com/ugd/120874_eb61cf396cdb4d1885dac4c2e8a4c3e2.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_05c2a572d12e4e6682f9ab3717bcca3c.pdf
    • https://static.usrfiles.com/ugd/bae0a0_a435ec031de4455b8f3cde1e1ce44ddf.pdf
    • https://static.usrfiles.com/ugd/d017d5_fb6176cece074ce28fc310c7d0439e46.pdf
    • https://static.usrfiles.com/ugd/87d215_c95edbc42de94e19ae7a1b4286d0016a.pdf
    • https://static.usrfiles.com/ugd/9421c8_20df67c3ffd746f797b2ff9f71058edd.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/pikorajimigegur.pdf
    • https://cdn.shopify.com/s/files/1/0440/0729/3086/files/savurufarumotakijavizanev.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6261/files/dynamics_in_atmospheric_physics.pdf
    • https://cdn.shopify.com/s/files/1/0432/7614/0710/files/spring_mvc_framework.pdf
    • https://cdn.shopify.com/s/files/1/0436/1207/8243/files/61659187957.pdf
    • https://cdn.shopify.com/s/files/1/0436/7056/9113/files/brazil_healthy_food_guide.pdf
    • https://cdn.shopify.com/s/files/1/0464/0669/7115/files/angular_8_material_dashboard_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/7483/7925/files/vadibam.pdf
    • https://cdn.shopify.com/s/files/1/0451/1550/6853/files/gcse_maths_simultaneous_equations_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/java_hashmap_tutorial.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_off00006fca.bin
77032cb31c7d2ba9b6303cf5415db3ea84135725f93b278297fa09345be4d44a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCA 5072 bytes
font_01_sfnt_off000080e0.bin
70463ee7c06c17d0d87e4e4158bce647181701f0d1553303366ead8ec28725ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x80E0 10288 bytes