Malicious PDF — malware analysis report

Static analysis result for SHA-256 94431c1ec47e0087…

MALICIOUS

PDF

34.2 KB Created: 2020-08-30 03:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2aee66ff0808add5c93b71398991f7dd SHA-1: 796d83bbaf8b4e9e5ff2aaa27bee6d14fba17f0f SHA-256: 94431c1ec47e0087d5e8fbfa03c9f863f724cbf51e18d97012f14d1623a811a5
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a critical heuristic due to its inclusion of a link to a known malicious redirector. Additionally, it contains a link farm with numerous external PDF links, many hosted on cdn.shopify.com, suggesting an attempt to manipulate search engine results or distribute content. The primary malicious URL identified is ttraff.ru, which is associated with the redirection.

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=the+monk+who+sold+his+ferrari+in+hindi+audiobook
    • https://cdn.shopify.com/s/files/1/0450/4931/5478/files/wasufapufokasu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1512/6685/files/ls_dyna_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/3140/3423/files/active_and_passive_voice_exercises_with_answers_advanced_level.pdf
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/pevanumupefutaredilapido.pdf
    • https://cdn.shopify.com/s/files/1/0428/8996/9820/files/my_steam_0_bytes.pdf
    • https://cdn.shopify.com/s/files/1/0449/9764/0360/files/13432170523.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2261/files/9185039131.pdf
    • https://cdn.shopify.com/s/files/1/0432/2652/9956/files/barras_bravas_argentina.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_39d0e8d8f4884b7b88c253a9a1351367.pdf
    • https://static.usrfiles.com/ugd/b8c837_92643ab8a8d8469095dfdf546edb9ea5.pdf
    • https://static.usrfiles.com/ugd/b8c837_9402a6163e4b41bfb02ef5bd293ab3a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_abe97db8667f451eb4f9fc76bc0e7710.pdf
    • https://static.usrfiles.com/ugd/b8c837_dbf61614925c45b59beeea5a0c209236.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15796621189.pdf
    • https://cdn.shopify.com/s/files/1/0432/8187/5104/files/sunafawaforenisiwa.pdf
    • https://cdn.shopify.com/s/files/1/0437/4636/1505/files/44937211061.pdf
    • https://cdn.shopify.com/s/files/1/0448/3658/5629/files/assimilation_and_elision.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4337/files/sosiruperagulufotixokakuk.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_off00004995.bin
129640726edc743af260b8666c3d119fe12d3492b2915676098d56e436da970e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4995 5392 bytes
font_01_sfnt_off00005bd2.bin
6224273be668a7d4caa42fbf536fbc331c75ca9dca49702195beb10cdf019ff7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD2 9276 bytes

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