Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86cce3485af1d9b…

MALICIOUS

PDF

36.5 KB Created: 2020-08-29 03:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e85fe2a7e94e5978718c442c1f219590 SHA-1: eab722b4936d9f516ca32310909d22b33485a43c SHA-256: d86cce3485af1d9b19c5d3495034954f3b507ac89cdb15261e61dd156e68fbe0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits a PDF link farm heuristic, with numerous links to PDFs hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary purpose is to redirect users to malicious content or to engage in SEO poisoning.

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.ru/wix?keyword=agressive+lesbian+porn
    • https://cdn.shopify.com/s/files/1/0434/6957/0198/files/91631461102.pdf
    • https://cdn.shopify.com/s/files/1/0437/6231/9521/files/maxaxejetepetawe.pdf
    • https://cdn.shopify.com/s/files/1/0438/0141/1744/files/fedex_freight_bill_of_lading.pdf
    • https://cdn.shopify.com/s/files/1/0434/7458/3702/files/american_eagle_womens_jeans_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0462/8463/6320/files/project_report_on_computer_virus.pdf
    • https://static.usrfiles.com/ugd/b8c837_8561ea4ef212406ea4f6aa3007d15b07.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec8c941a7d414054beb542e1639821aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_92488ebecacd42a48bb8969f0ff89d03.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8cd22d591d64e009cedc85c9e5d6fd6.pdf
    • https://static.usrfiles.com/ugd/b8c837_c61a0aee4fac4d42a7e57be25f962646.pdf
    • https://static.usrfiles.com/ugd/b8c837_c61f6b77d62540bba99e722449cd760c.pdf
    • https://static.usrfiles.com/ugd/b8c837_184f284dc41c41738d9cb2833859b8bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a61fc3bb1214983a4047278be7b03db.pdf
    • https://static.usrfiles.com/ugd/b8c837_31847609d2fd45fd910c65fdb1e5097c.pdf
    • https://cdn.shopify.com/s/files/1/0428/5032/0543/files/44733370300.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/xidad.pdf
    • https://cdn.shopify.com/s/files/1/0437/3381/1351/files/peboxawiwokolutanar.pdf
    • https://cdn.shopify.com/s/files/1/0433/8375/0821/files/cctv_camera_installation_guide_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/vekebane.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/
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050eb.bin
5aeb71030a45ff3bae7eda293125f2dff3d126df983ce9c12290948e6d73e480		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50EB 5176 bytes
font_01_sfnt_off0000629b.bin
fc8624e136fee3c9429911f20dc90c01cf503338a788cdc009347d9f9a7b66f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x629B 10084 bytes

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