Malicious PDF — malware analysis report

Static analysis result for SHA-256 fed8837392c34cf2…

MALICIOUS

PDF

48.0 KB Created: 2020-08-13 14:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea004d37315f61136f0268b4d4ff2815 SHA-1: d6a6f7a3d0bfc67cb4c96dae1d5c0f4453dcc339 SHA-256: fed8837392c34cf2981c74d8472cec92b020c48c1aab39599ef1fbce364f635e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with malicious redirectors or link farms. The primary malicious URL identified is https://ttraff.ru/pify?keyword=benim+hocam+tyt+co%25C4%259Frafya+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links to potentially malicious PDF files hosted on various domains. This suggests a phishing or redirection attack aimed at leading users to harmful 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.ru/pify?keyword=benim+hocam+tyt+co%25C4%259Frafya+pdf
    • http://zigedugu.227photo.com/uploads/1/3/1/4/131453541/wavulunakoxigifomud.pdf
    • http://files.irishracehorseowners.com/uploads/1/3/1/3/131379724/4b78eb2582eaf.pdf
    • http://files.belleminks.com/uploads/1/3/2/7/132740515/bdc7c31e38d9cf.pdf
    • http://lufegaxa.midamericaprospects.com/uploads/1/3/0/7/130776106/simaworadusu.pdf
    • https://cdn.shopify.com/s/files/1/0446/5026/6787/files/appearance_word_search.pdf
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/revobara.pdf
    • https://cdn.shopify.com/s/files/1/0434/5489/0149/files/newabagowukuwagowutomur.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/guregokewewejoporafe.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6495/files/spreadsheet_in_excel.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/ritofegovu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8833/8330/files/vonevesevapugemozulo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/metegemekipezafekude.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/wunefefovimaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/matam.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/wupatomimimugagexi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/joyce_meyer_be_anxious_for_nothing.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/35346588589.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/nekezobaniwuz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006580.bin
23bd76e89de6f6e9285d07208efdbd514c6a95885ab4b94e5c8ca0d752690897		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6580 5096 bytes
font_01_sfnt_off00007726.bin
b742b2c1b227276c506d78c3300b5a4e670d808eced57399041710e0cfbda39c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7726 5568 bytes
font_02_sfnt_off000089eb.bin
c0674e374fe485dbb1c905bcee053585e077b485da29a416e8aaeae3a9c80842		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89EB 12272 bytes

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