Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7f7c5be09861bd…

MALICIOUS

PDF

73.4 KB Created: 2020-07-27 23:58:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c99322d2282c72eefd272d61f337fee8 SHA-1: 6fd3dd6eee62d48529ee97d47e331120f2b36837 SHA-256: fa7f7c5be09861bdba03f96896185dfe0e3b4b00319d23bb3f999d30b538d59d
152 Risk Score

Malware Insights

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

The PDF file contains a link farm of 18 external PDF links, with the primary redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, suggests a lure related to a 'Cypress annual report'. The ML classifier strongly indicated maliciousness, and the presence of numerous links to external PDFs hosted on platforms like Shopify, combined with a malicious redirector, points to a social engineering attempt to drive traffic to malicious content.

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=cypress+annual+report
    • http://files.tinagutierrezartsphotography.com/uploads/1/3/0/7/130775383/remax-taxopugazaledu-fuluxibejurifuj-lavosiraleset.pdf
    • http://files.greaternewhopelr.org/uploads/1/3/1/6/131606127/c0dd0eb1d9.pdf
    • http://files.woodlandsfrenchies.com/uploads/1/3/1/3/131383553/buvomagedax_dopiriveluk.pdf
    • http://files.regenerativebusinessinstitute.com/uploads/1/3/1/3/131379049/887970.pdf
    • http://files.moreheadtheatre.org/uploads/1/3/0/7/130775521/puguzujijamolor.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/detis.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/31325127626.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/gosibiziretirup.pdf
    • https://cdn.shopify.com/s/files/1/0432/0801/6027/files/77140583715.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/sunilejanawojimiwuna.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0325/files/muviwanaxuxijumel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulifagavukaxubodipiripu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2806/7990/files/biripuvejepatoxazeko.pdf
    • https://cdn.shopify.com/s/files/1/0436/1024/3229/files/ganixizolopo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4476/files/97334669002.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/jokepitefimawibugu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/44197909798.pdf
    • https://cdn.shopify.com/s/files/1/0438/1288/0544/files/tawim.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_off0000d533.bin
4a362fb9ceae412cd0960f09a9fbaf00447233aeab7ec04c19bc19121e256302		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD533 4772 bytes
font_01_sfnt_off0000e582.bin
790bdae16fe98eae07d72128ce9837e9c580ec9752aefe1257f1f4bd6efae512		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE582 16448 bytes

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