Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7c057293c1226e…

MALICIOUS

PDF

48.9 KB Created: 2020-08-25 21:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1225ebf0e65dd74342da1bba59cef3c1 SHA-1: 555476320fd616de4ee7e2eafda7c8d53a3c54aa SHA-256: 1d7c057293c1226ea61ffac24a423a850f19f8efe5659bab20c53ff6a21ec498
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm with 17 external links, including a redirector to 'ttraff.ru' which is flagged as malicious. The document body, though partially corrupted, contains the text 'Best bengali astrology book' and the malicious URL, suggesting a lure to a scam or phishing site. The ML classifier strongly indicates maliciousness.

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=best+bengali+astrology+book
    • http://rixez.projectreturnmilwaukee.org/uploads/1/3/0/7/130738970/6326142.pdf
    • http://files.murraydopking.com/uploads/1/3/0/8/130814245/megukiliru-dawuvi-mujukebimivubaf-mexasezefizo.pdf
    • http://sofewegu.1stmichiganartillery.com/uploads/1/3/0/8/130814328/93ae553689.pdf
    • http://files.therealitynews254.com/uploads/1/3/2/7/132712358/mipexiliwimeliji.pdf
    • http://files.totemtienda.com/uploads/1/3/0/8/130814297/murifeduvagujafutipu.pdf
    • https://cdn.shopify.com/s/files/1/0462/3433/7431/files/80068493372.pdf
    • https://cdn.shopify.com/s/files/1/0432/5035/2296/files/gulekamoxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/9963/5355/files/gavukuberowuromenaxegab.pdf
    • https://cdn.shopify.com/s/files/1/0431/2704/6298/files/nutricion_enteral_y_parenteral_anaya.pdf
    • https://cdn.shopify.com/s/files/1/0432/8118/6971/files/42982863403.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/19937187322.pdf
    • https://cdn.shopify.com/s/files/1/0430/9942/2871/files/nodumazuzu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8319/files/caractrisation_vectorielle_du_centre_de_gravit_d_un_triangle.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/71709124581.pdf
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/kisajoginuwivizupi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7166/7360/files/xofiw.pdf
    • https://cdn.shopify.com/s/files/1/0457/7011/3190/files/free_responsive_email_template_for_mailchimp.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_off00006fbf.bin
85133ff2688a2845fac22eae223366104b6ff0fc73ac5e88c06e7779239ed62b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBF 5208 bytes
font_01_sfnt_off00008188.bin
abc176c4ac61ec0fe5a8ba66b8611964d6a2f91f293df7c28c632963f3eb6de0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8188 5164 bytes
font_02_sfnt_off00009249.bin
cc48b92ae06d29ff4d26bcb7c57dfa2de80681592b15f4ce37d0203fc37bd329		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9249 10620 bytes

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