Malicious PDF — malware analysis report

Static analysis result for SHA-256 609d1cbae66d89ee…

MALICIOUS

PDF

34.3 KB Created: 2020-08-24 16:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ed7c4697b81f9ea4a49b31448f0d2d5 SHA-1: 6433755fe30bce8f95ebfcd8348797d4ba01b6a9 SHA-256: 609d1cbae66d89ee3cf77442a7e16567b0693755f38fbe995170c0a810c7d0f4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to a redirector infrastructure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=adidas+performance+store+dubai+mall, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to drive traffic to malicious sites under the guise of retail information. No scripts were extracted, but the heuristic firings strongly indicate malicious redirection and link farming behavior.

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/pify?keyword=adidas+performance+store+dubai+mall
    • http://files.samsungsmarthome.net/uploads/1/3/1/4/131438639/2169016.pdf
    • http://zekat.weekendreflections.com/uploads/1/3/0/7/130776445/xekixoz_fofomidokubivar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8829/8659/files/33803381481.pdf
    • https://cdn.shopify.com/s/files/1/0434/3378/7542/files/best_rom_site_2019.pdf
    • https://cdn.shopify.com/s/files/1/0437/7971/9317/files/gabogumodudopugegupew.pdf
    • https://cdn.shopify.com/s/files/1/0436/4032/4256/files/mefasufak.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/fukosexireg.pdf
    • https://cdn.shopify.com/s/files/1/0429/0668/1497/files/83429573449.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/75387126752.pdf
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/lord_of_scoundrels.pdf
    • https://cdn.shopify.com/s/files/1/0430/2431/8618/files/40197969318.pdf
    • https://cdn.shopify.com/s/files/1/0438/7710/5832/files/45192068783.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/mobelofitanesojizitulo.pdf
    • https://cdn.shopify.com/s/files/1/0439/2275/1643/files/vetewuvinafumuvefugu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tolipokegegami.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/dititex.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004944.bin
2842005bd9ca6d44e02add8b0fd83512d06359cea22f810c6433b68290b7be8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4944 5432 bytes
font_01_sfnt_off00005b9b.bin
ca6cbd169aec589bcc791b6fed47f83c2e912f544a695a20be7bc952b0075d7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9B 9548 bytes

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