Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f1e5dfd758a2f31…

MALICIOUS

PDF

40.8 KB Created: 2020-08-31 01:21:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d07415c20cdd2f42c5e3ff3c4c8975de SHA-1: 2ba4f6ad1732a81f97a5582d98ec1b147ff21511 SHA-256: 7f1e5dfd758a2f316a60812a70dc2b180fe4467a399970af775d52ed9136233a
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to host or distribute further malicious content. The document body and embedded links suggest a lure related to movie search results, aiming to trick users into clicking the malicious URL. The ML classifier strongly supports the malicious nature of this PDF.

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=bloodrayne+the+third+reich+2011+full
    • https://static.usrfiles.com/ugd/dc8a8e_72133e82699040d5b4249c4fa8b5a04b.pdf
    • https://static.usrfiles.com/ugd/0779a3_b976549d407b471f8c49dab76e94a7e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0a1acd69a744bdc87d22a4cbe0bff06.pdf
    • https://static.usrfiles.com/ugd/9374a7_85f461cda84342a49ac8aa6c336e7111.pdf
    • https://static.usrfiles.com/ugd/b8c837_007c84f8449f45b1aed9b09d4a4f3800.pdf
    • https://cdn.shopify.com/s/files/1/0434/6612/9574/files/falabinekisuvupuluzavola.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/lowes_rincon_ga.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_6c70e911f64a41228d8730999f2e388c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9548bc96a7074bd3b6b505c4f8f6eca4.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_98595ae0553b4f1aa68a42b532c83150.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_df062aad77654490934ba96df65180f0.pdf
    • https://static.usrfiles.com/ugd/f967ac_836ab2bf928f48849d3e09c3eecc1a18.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_off00006002.bin
8fda9d481547e6f20ab70be723371690ff39305a8874bba0f9d873fd102a55a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6002 5408 bytes
font_01_sfnt_off0000726e.bin
9b5b6ae4a4cf31151ca7a519a91b1e492a6747830f354d4bd4d3c26e5e8631c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x726E 10676 bytes

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