Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0474abe074b5c38…

MALICIOUS

PDF

51.2 KB Created: 2020-08-30 21:07:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c49b69bd55d7da33d54cfcdbbb8784c3 SHA-1: e35faeee8786dade393dde6a96b2eaac9aba8670 SHA-256: d0474abe074b5c384dd1bf202761a27167fafe276cec79d8a8da28df2d1086d5
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/wix?keyword=old+animations+mod, which is identified as a malicious redirector. Additionally, the file exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources, suggesting an attempt to distribute malicious content or conduct phishing.

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.ru/wix?keyword=old+animations+mod
    • https://static.usrfiles.com/ugd/b8c837_e02019584a954817afa1533844b0729b.pdf
    • https://static.usrfiles.com/ugd/b28561_fb0cf3e9c8944587b274bb8859027ee4.pdf
    • https://static.usrfiles.com/ugd/2f8cea_f87c8138197f4c018c2ac8762014e3ca.pdf
    • https://static.usrfiles.com/ugd/b8c837_43cdedc5c9ef437aaec158e14bc2b1c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef9bff7715084d1098bf4381f9438443.pdf
    • https://static.usrfiles.com/ugd/b8c837_06a9dc8ef38e4806ba7a746ce811dd53.pdf
    • https://static.usrfiles.com/ugd/8b2c09_600d5913ea324f5dab34f92a4b247331.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/police_nsw_report_lost_property.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/read_csv_file_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zurutadodusabexefiba.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3602/files/9509429648.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_off00005f77.bin
724e1c385940e5d1c75639471e4173e166c4089543600f9860f7c12fc571d5db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F77 3800 bytes
font_01_sfnt_off00006cff.bin
394b5322a9eba5e467e9152820f97aaf15bc164f210db2c690d12466f80abff5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFF 4900 bytes
font_02_sfnt_off00007d97.bin
9a0425e808d5683ac1f6cadd8a8f20025c3492398bccc725e8f77012b0c9cbbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D97 14704 bytes
font_03_sfnt_off0000ab62.bin
6f41d85279102efce3c4bd26fddb767baf9b68a4f55e239fba9bedc2a2d3b953		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB62 16064 bytes

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