Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3dca3cd79b40d97…

MALICIOUS

PDF

45.6 KB Created: 2020-08-13 23:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdf2467125cf19662d33592bcadff812 SHA-1: 92a7b6b69fcac90f9cdbe6c82c6f881c9d2e7e87 SHA-256: c3dca3cd79b40d97ec3514fa03e62f429534b6d4f5d7aa04548b9a8c4ac1e525
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains multiple embedded links, with a critical heuristic identifying a redirector link to 'ttraff.com'. This suggests the document's primary purpose is to lure users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the presence of numerous links, including a suspicious redirector, indicates a likely phishing or malware delivery 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.com/pify?keyword=working+capital+requirement+balance+sheet
    • http://files.cogsuite.net/uploads/1/3/1/4/131437508/98ee17408e5.pdf
    • http://files.tgifteachersgetitfree.com/uploads/1/3/1/4/131406288/db92a091da.pdf
    • http://files.kiamichcouncil.com/uploads/1/3/1/4/131437531/9dcaa9b.pdf
    • http://files.pamelathibodeaux.com/uploads/1/3/1/4/131409200/0ed67a21df1.pdf
    • http://files.laparisienneseattle.com/uploads/1/3/0/9/130969837/6273016.pdf
    • https://cdn.shopify.com/s/files/1/0444/1610/6663/files/magisterium_5.pdf
    • https://cdn.shopify.com/s/files/1/0430/1937/0659/files/53139400619.pdf
    • https://cdn.shopify.com/s/files/1/0429/6340/2905/files/54311896357.pdf
    • https://cdn.shopify.com/s/files/1/0438/9853/6091/files/nomenclatura_de_disacaridos.pdf
    • https://cdn.shopify.com/s/files/1/0439/4775/3640/files/10560073753.pdf
    • https://cdn.shopify.com/s/files/1/0433/7546/0515/files/acupuntura_para_bajar_de_peso.pdf
    • https://cdn.shopify.com/s/files/1/0432/0319/9136/files/kewixoriduzekutetodug.pdf
    • https://cdn.shopify.com/s/files/1/0440/9013/0584/files/citizen_calibre_8700_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/8695/4140/files/anoreksia_nervosa_adalah.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_off00006405.bin
0f1097475889a74662e50cf74ba1fa22fbcad54d7e13101db161a78ebb9c3b4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6405 5572 bytes
font_01_sfnt_off000076d3.bin
e78ddbf35990f72ede4efc8e0340abd518bdbdd8a90849f57134d25793b023db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D3 10640 bytes
font_02_sfnt_off00009b4a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B4A 4324 bytes

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