Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e27df1ab49861a…

MALICIOUS

PDF

40.5 KB Created: 2020-08-30 10:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a5be46486e788d98988455a9eef68ac SHA-1: 70d74b89ee4de2380961a2025aed3473577e0413 SHA-256: 59e27df1ab49861a31ddb557bedc8f799036e83d792e300ef305c4ca90cef620
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 pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same malicious URL and references to software downloads, suggesting a lure to a malicious site. No scripts were extracted from this sample.

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=mozilla+firefox+gezginler+indir+2014
    • https://static.usrfiles.com/ugd/5de1df_91371358077c4d89996374818bd47557.pdf
    • https://static.usrfiles.com/ugd/ade4e6_e0b539c75c6f47e3ba5179daa9c7984b.pdf
    • https://static.usrfiles.com/ugd/b8c837_c7b8a4c79c6443cdbd04f2d7c564ebca.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_de4f05b99e97457d993a6351bd3d56cb.pdf
    • https://static.usrfiles.com/ugd/b8c837_86be33b931344efba0f429b74e7e9e4c.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/midoz.pdf
    • https://cdn.shopify.com/s/files/1/0448/1702/3138/files/america_the_story_of_us_westward_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/duke_s_anesthesia_secrets.pdf
    • https://cdn.shopify.com/s/files/1/0432/7312/6052/files/lotus_smartsuite_manual.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_off0000595a.bin
1dc52881f4fb2fe11a797002e718bcc22b37adfaf74c09efcc7e722fc0e9e610		 pdf-font-stream PDF embedded font (sfnt) at offset 0x595A 5436 bytes
font_01_sfnt_off00006c07.bin
7daf936e1cc173a6b4778a41a164613e7fe55f9cb339315a877b07ffee6082ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C07 12492 bytes

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