Malicious PDF — malware analysis report

Static analysis result for SHA-256 c689fb0e1f7b8031…

MALICIOUS

PDF

58.4 KB Created: 2020-08-17 13:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 303b95448c2e3399b9a6b55c2e59576c SHA-1: af3eaf652b3397b757bf885b76549ddb7ea2b5cf SHA-256: c689fb0e1f7b8031c6cfe01718f4cc5c585233bd6d65210fe0c6d5f220cca8bc
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=best+choreography+dance+video'. This indicates the document's primary purpose is to lure users to a malicious site. Additionally, the PDF was flagged as a link farm, containing numerous external links, many of which point to potentially malicious or unknown domains. The ML classifier also strongly indicated 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.cc/pify?keyword=best+choreography+dance+video
    • http://files.77thmeridian.com/uploads/1/3/0/9/130969148/81285f.pdf
    • http://gifeju.reclmc.com/uploads/1/3/1/3/131383363/66773.pdf
    • http://files.brentfunkhousermusic.com/uploads/1/3/0/8/130813427/7f80f4db743b28.pdf
    • https://cdn.shopify.com/s/files/1/0433/7988/4186/files/la_boite_a_merveille_chapitre_5.pdf
    • https://cdn.shopify.com/s/files/1/0434/3287/0037/files/fitixopevazelavip.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8551/files/57778924227.pdf
    • https://cdn.shopify.com/s/files/1/0440/6339/1894/files/periodic_table_with_element_names.pdf
    • https://cdn.shopify.com/s/files/1/0430/8369/4247/files/appointment_cards_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0104/files/gelizovezuxizefotijex.pdf
    • https://cdn.shopify.com/s/files/1/0429/2644/0607/files/zimexi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6802/3194/files/89774555240.pdf
    • https://cdn.shopify.com/s/files/1/0451/7848/6933/files/jogovuporuteve.pdf
    • https://cdn.shopify.com/s/files/1/0436/0437/7763/files/lanaredutepixisadedu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0583/6438/files/libulikalu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8034/1917/files/jewusubidiramuvogobariw.pdf
    • https://cdn.shopify.com/s/files/1/0436/9930/6650/files/textbook_of_systematic_botany.pdf
    • https://cdn.shopify.com/s/files/1/0433/8348/8679/files/anatomy_and_physiology_applied_to_obstetrics.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_off0000a6a3.bin
2017b44e0b30166a43d31fac0add540ffddb7c3863cea7170db356b9339822a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6A3 5516 bytes
font_01_sfnt_off0000b963.bin
ca5a8fb4f2882c8f0cc76e10d7e6eb0ad026712c63124d7902dce512f1d3e4e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB963 10192 bytes

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