Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c3e3aed869f8cca…

MALICIOUS

PDF

38.0 KB Created: 2020-08-29 17:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3ee366785ba5d4c87e44c9d4e6bb75f SHA-1: fb744a9efc86e6680516f55b98f96fbb35cfdfba SHA-256: 3c3e3aed869f8cca733add2e3fef4be57a85fa7bea54159e8f2f83984b230413
152 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs to a known malicious redirector at 'ttraff.cc'. The ML classifier strongly indicates maliciousness. The document's purpose appears to be to lure users into clicking these links, likely leading to further malicious content or exploits.

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.cc/wix?keyword=la+princesa+que+creia+en+cuentos+de
    • https://cdn.shopify.com/s/files/1/0435/3985/7563/files/varesazekemev.pdf
    • https://cdn.shopify.com/s/files/1/0432/4940/2016/files/34525485629.pdf
    • https://cdn.shopify.com/s/files/1/0434/0806/4677/files/88496898046.pdf
    • https://cdn.shopify.com/s/files/1/0435/1236/5211/files/linotudoweditav.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/84317724695.pdf
    • https://cdn.shopify.com/s/files/1/0436/1856/6306/files/86491615999.pdf
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/kenya_budget_speech_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/3590185073.pdf
    • https://cdn.shopify.com/s/files/1/0441/1473/9352/files/govavepopofiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2864/files/super_metroid_redesign_rom.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/kambikuttan_cartoon_download.pdf
    • https://cdn.shopify.com/s/files/1/0463/6744/1051/files/engagement_letter_template_law.pdf
    • https://cdn.shopify.com/s/files/1/0441/3584/1944/files/13028773777.pdf
    • https://cdn.shopify.com/s/files/1/0430/6668/7642/files/tuzijudamabuduvepafew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57148414383.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_off0000552e.bin
9cbe5ed3becf19d7790d88d83c499d641c1eb4103058919652c8b77d450b9d29
pdf-font-stream PDF embedded font (sfnt) at offset 0x552E 5100 bytes
font_01_sfnt_off00006687.bin
89cb9786b23c8e4b8efd684d664e089f8da20fe14fa8aad9de9bc47eff7fe1c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6687 10788 bytes