Malicious PDF — malware analysis report

Static analysis result for SHA-256 618f3fad52224441…

MALICIOUS

PDF

34.8 KB Created: 2020-08-04 14:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb359daea3d2d1c00a9396ffbbffa33f SHA-1: 2e5f39f71f6d0685f72d871cff45b27aebe06fa8 SHA-256: 618f3fad522244419fcfe94e12a358648957889a6ce34f6945c206809e0225f0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to a redirector service, suggesting a link farm or phishing campaign. The primary malicious URL identified is https://ttraff.cc/pify?keyword=alt+linear+functional+analysis+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other benign-looking PDF links, likely to create a deceptive appearance of legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=alt+linear+functional+analysis+pdf
    • http://radenik.bradylarsonart.com/uploads/1/3/1/0/131070109/8962784.pdf
    • http://files.usauwrwomen.com/uploads/1/3/1/4/131437249/varogukagowe-sebil-xagitezikijepon-gosunu.pdf
    • http://pitegoso.camarillospringsseniorgolf.com/uploads/1/3/0/7/130775612/pugeketerivubuwi.pdf
    • http://files.realestatesystemsofgillette.com/uploads/1/3/1/8/131856491/69f343203b853.pdf
    • http://files.seenbyc.com/uploads/1/3/0/8/130814110/mesojagumixewanegix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xubeke.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/buweluwezilu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0491/8941/files/gotokutudexefij.pdf
    • https://cdn.shopify.com/s/files/1/0433/8515/9843/files/patafoxatanexapafu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4640/2213/files/57524881244.pdf
    • https://cdn.shopify.com/s/files/1/0434/8765/8150/files/ludibefuwobaxedikagaza.pdf
    • https://cdn.shopify.com/s/files/1/0437/5104/7329/files/68602425868.pdf
    • https://cdn.shopify.com/s/files/1/0435/8737/1171/files/jijokodi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/wukakaperapevomoxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/jomolufonowo.pdf
    • https://cdn.shopify.com/s/files/1/0440/7495/9000/files/nugumuxedixuvati.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/19450122241.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b1f.bin
08bba0dad85fc5ac7ede8d91fd19ab6d7faee130b57c996cd770fd9cadf6379c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B1F 5240 bytes
font_01_sfnt_off00005d0e.bin
e409fe63d25e73d5128247042ad628e94ecc87b4fbb1a2ab2ad6157abddb23a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0E 9720 bytes

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