Malicious PDF — malware analysis report

Static analysis result for SHA-256 2187f40a01ffab5a…

MALICIOUS

PDF

43.5 KB Created: 2020-09-01 12:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f63c09fbadfdbf80b2db02e59e50a6b1 SHA-1: 1f08f8e3b9f3b594d0e817082603fa993fa2fecf SHA-256: 2187f40a01ffab5a26b7022cc5de95af529616b2630813de0e4b55958258d35c
152 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, which is also present in the document body. This link, 'https://ttraff.ru/pify?keyword=calling+all+mixels+apk+free', is designed to lure users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to benign Shopify URLs, but the primary malicious intent is driven by the ttraff.ru redirector.

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/pify?keyword=calling+all+mixels+apk+free
    • https://cdn.shopify.com/s/files/1/0431/5791/3749/files/71950446819.pdf
    • https://cdn.shopify.com/s/files/1/0433/3702/3656/files/agyaat_1_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9143/files/arduino_library_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/fahrenheit_451_part_3_questions_and_answers.pdf
    • https://static.usrfiles.com/ugd/b8c837_73340e03bf734e0db3ff44b49dbedbd9.pdf
    • https://static.usrfiles.com/ugd/87a178_ebc3530df9444595a2e1e2b0bb7edfd1.pdf
    • https://static.usrfiles.com/ugd/e2b09b_e4e13fc4c04c40b181c80e8198d3bdb8.pdf
    • https://cdn.shopify.com/s/files/1/0438/0046/1474/files/5._1_amplifier_circuit_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0436/7728/6553/files/16200616454.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_off00006074.bin
6fa3b0baf7ab7049115f8315e651bb227ce14a2a34fa61fe06e68aeb4856729a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6074 5256 bytes
font_01_sfnt_off00007249.bin
5ee0a9071f7f6cd31fbb2c64b0fd669d9216e62f59d2e5de4be1d68cd4e09cf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7249 14804 bytes

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