Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded0daecf112dd5b…

MALICIOUS

PDF

44.6 KB Created: 2020-08-23 13:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 378a276903f8861d31a2150404eeae95 SHA-1: fc11e8eef038dfcdb18d5819717054d21d576ef8 SHA-256: ded0daecf112dd5bedafffe334f1aa59bcc4755b2995298ede59528b4db8530f
152 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as a lure for 'free movies', which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other links pointing to PDF files, suggesting a link farm or redirection strategy. The ML classifier strongly indicates maliciousness, supporting the conclusion that this is a phishing or redirection attempt.

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=free+movie+s+no+registration+2019
    • http://dikukijo.cardiac-imaging.org/uploads/1/3/1/4/131409090/sunukejidumi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bopeberovejaxurid.pdf
    • https://cdn.shopify.com/s/files/1/0432/8030/2240/files/93072065795.pdf
    • https://cdn.shopify.com/s/files/1/0437/1179/1253/files/sheet_silicate_structure_definition.pdf
    • https://cdn.shopify.com/s/files/1/0438/1042/2941/files/articles_exercises_with_answers_doc.pdf
    • https://cdn.shopify.com/s/files/1/0461/6405/0083/files/crazy_craft_mod_pack_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/zufisubowiriduvumuzere.pdf
    • https://cdn.shopify.com/s/files/1/0437/3420/4568/files/jesotuluvulip.pdf
    • https://cdn.shopify.com/s/files/1/0435/2969/9482/files/foburejuwo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006394.bin
547774d7cee1b044516b1906342d5a2debdb6407c1a879fc71db130bb84a406c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6394 3452 bytes
font_01_sfnt_off00006fe7.bin
fc430a82b699a4fd8ef92d697f5306a6a2628e45c25a28af8d6a82f40eaefe01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE7 5472 bytes
font_02_sfnt_off00008275.bin
7df6019544353e6fe8fd08108ce31270947d09ecfea79ab1efe587d0e45a5d49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8275 10308 bytes

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