Malicious PDF — malware analysis report

Static analysis result for SHA-256 061c27eccc91a7e6…

MALICIOUS

PDF

41.4 KB Created: 2020-08-02 22:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 502c72514decae47cf869158b8902000 SHA-1: b1c358740ce432f1581943a007a588abb2fe5f99 SHA-256: 061c27eccc91a7e61d7acbe521cf535f12317873d9381d4a99b3b21419114343
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=mope+io+sandbox, suggesting a link farm or redirection attempt to a malicious site.

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/pify?keyword=mope+io+sandbox
    • http://files.fatimamontieldesign.com/uploads/1/3/1/0/131070171/xajowabi.pdf
    • http://files.allrequestdjdave.com/uploads/1/3/1/3/131384401/d31c26.pdf
    • http://files.scotty-elmslie.com/uploads/1/3/0/7/130776503/29e1477389.pdf
    • http://files.kirstenangerbauer.com/uploads/1/3/1/4/131437623/noropuzujokuduvasej.pdf
    • http://files.knockinondoors.com/uploads/1/3/0/7/130738548/winixit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/3150/8645/files/2022310200.pdf
    • https://cdn.shopify.com/s/files/1/0435/5624/1557/files/foxiximikajiwesifa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tepumesuz.pdf
    • https://cdn.shopify.com/s/files/1/0441/2401/2696/files/8209899705.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.pdf
    • https://cdn.shopify.com/s/files/1/0435/9910/2110/files/mosof.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/jevenogugatu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/zuwategelibi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/31954952235.pdf
    • https://cdn.shopify.com/s/files/1/0429/1310/4035/files/mewemafutopibilolovero.pdf
    • https://cdn.shopify.com/s/files/1/0434/2222/0439/files/csgo_crosshair_commands.pdf
    • https://cdn.shopify.com/s/files/1/0437/1218/4474/files/tonalubaro.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000503b.bin
2f2d408871e10bf2c54e3b037865c0bceb8f51038d08977309a7b8153127f37a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x503B 4744 bytes
font_01_sfnt_off00006060.bin
5fd177849d3a77b0d604bdc1d78ea6828d07112e7a7feebc5a3199ee9460d3d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6060 13412 bytes
font_02_sfnt_off00008af7.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF7 4324 bytes

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