Malicious PDF — malware analysis report

Static analysis result for SHA-256 446e8681c3763c42…

MALICIOUS

PDF

52.3 KB Created: 2020-09-05 02:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07b8e2500e72134e8ae9a7156ffcc6fc SHA-1: 9d35128c60a1f743eb2fa87794fdd197e2d1c7af SHA-256: 446e8681c3763c429e11bee03bf9a0dbdfa4235f0aeef4ee05f4fdb8b2265513
152 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same malicious URL and appears to be a lure related to "Vs code python code formatter". The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, suggesting a link farm or distribution mechanism for 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.club/wix?keyword=vs+code+python+code+formatter
    • https://static.usrfiles.com/ugd/cb5dea_7da8c5bf77a34fa49664f0b3a4c4b3bf.pdf
    • https://static.usrfiles.com/ugd/7ef0dc_37482722ff37482f954064c7053933f2.pdf
    • https://static.usrfiles.com/ugd/ecec20_eb96b5ccf7b1405b8536b7749b8de199.pdf
    • https://static.usrfiles.com/ugd/f14cf6_0616b04ef1d74cb1b8147c30d8b4ad37.pdf
    • https://static.usrfiles.com/ugd/934fc3_8559568a5d6943fa99c9c547fa0469bf.pdf
    • https://static.usrfiles.com/ugd/0cd019_dff2b59fdcb94cd7a68c53767e66d096.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_72d281877dcc40e3afe7eab67dd2771d.pdf
    • https://static.usrfiles.com/ugd/3d0627_4d98181b32d24bd1a3d94663444c9644.pdf
    • https://static.usrfiles.com/ugd/20d83a_6a5d8113623047e2845ecc008992b3e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ea319eff5db48a3b0b40251a6ba6f08.pdf
    • https://cdn.shopify.com/s/files/1/0463/0872/0805/files/brembo_racing_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0433/4098/8575/files/junior_business_analyst_cv.pdf
    • https://cdn.shopify.com/s/files/1/0432/6844/0232/files/the_beatles_complete_chord_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/19624752832.pdf
    • https://static.usrfiles.com/ugd/225520_67525eb0edb443f9babf1710a98e6bad.pdf
    • https://static.usrfiles.com/ugd/b77b08_91bae6ed42b94cf2b7b448fa53ef21dd.pdf
    • https://static.usrfiles.com/ugd/fafc38_12bee3fcfd87417d9b3dcdf032058991.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000664c.bin
2b36c086d41d14bfaf810c2c2fdbbabc76d8921b885d75c09e9c8bc7828e51d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x664C 5168 bytes
font_01_sfnt_off000077a8.bin
2e1af43996604724be57f1755abb6bd4f412022a7ef46fe27fe906db4ec7303a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A8 12192 bytes
font_02_sfnt_off00009f5d.bin
f39e9e9f43c7c40e6bb0dc45935be0984834dda4bcc99ebcb1a0004d0f1476d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F5D 16524 bytes
font_03_sfnt_off0000b587.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB587 4324 bytes

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