Malicious PDF — malware analysis report

Static analysis result for SHA-256 a757570a0a8c270f…

MALICIOUS

PDF

48.2 KB Created: 2020-08-29 10:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f298a47718993453510015f9a364b3b1 SHA-1: ea304e4446d7afc29d226ae6402c218621127a37 SHA-256: a757570a0a8c270f46101f8128b486517beee06be4c23081f2a21a39e1d971ac
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.com/wix?keyword=los+12+pilares+de+jim+rohn+audiolibro', points to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to malicious infrastructure under the guise of providing access to various PDF resources.

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/wix?keyword=los+12+pilares+de+jim+rohn+audiolibro In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1515/9458/files/cara_buat_cv_lamaran_kerja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/0018/8327/files/botoposefonisafufikeril.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6888/3097/files/61011024903.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_43733c1196504b1db6c4a34a0a534cd8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_92bea7a586fd4e00a08e629d2fab10a1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_12820c254eba47cc95acd519ef0f5bf1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_feea9c8c46c14084a1ed97d141a35646.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_aa9ca426d15349f3a5bc093628f85eeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4525/7367/files/95188074000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1682/0635/files/cesar_aira_la_cena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4570/7166/files/81718899245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2823/1830/files/25439401986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1986/0125/files/53205318339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3393/5519/files/bizupex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9614/6074/files/electronic_amplifier_circuits_theory_and_design.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://static.usrfiles.com/ugd/b8c837_92bea7a586fd4e00a08e62In PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cee.bin
3d0cf802358881b1f88469c470a339f66ddeee0975564d595b0ded970e991958		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEE 5344 bytes
font_01_sfnt_off00007ee0.bin
ab3687988c30886e04798bcb8a16ebba4e099028b8ec7988b2aa26367febdbf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE0 11196 bytes
font_02_sfnt_off0000a374.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA374 4324 bytes

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