Malicious PDF — malware analysis report

Static analysis result for SHA-256 d17d0dfffc937eb5…

MALICIOUS

PDF

41.8 KB Created: 2020-07-30 21:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26a3cfd00ef364c89ee1568b9539722d SHA-1: 294339b129ffd34b7b640ac3691de2c9d23cb4b6 SHA-256: d17d0dfffc937eb5850b56aac8b3e456f3408626ec704fd4ffb02c0f02caa3c6
154 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 external links, many hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, appears to contain metadata related to the title 'Djiny Yeck literatury luciano canfora pdf', suggesting a lure to related content. The primary malicious activity observed is the redirection to a potentially harmful URL.

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/pify?keyword=d%25C4%259Bjiny+%25C5%2599eck%25C3%25A9+literatury+luciano+canfora+pdf
    • http://files.nexuseconomics.org/uploads/1/3/0/7/130775974/3931035.pdf
    • http://files.leslieslanguage.com/uploads/1/3/2/7/132740595/sexuviteru_wovilolewoz_sitelekoxiz.pdf
    • http://files.northstarscc.com/uploads/1/3/0/8/130813639/guriferefe_romizotej_mokobero_buzeg.pdf
    • http://files.uprisingstarsinc.org/uploads/1/3/1/3/131379045/gowofikur.pdf
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/83526450488.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fesulemenakasisot.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/daxiwozovujuji.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/fesasubizezogu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8724/1119/files/64854772905.pdf
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/31690131391.pdf
    • https://cdn.shopify.com/s/files/1/0437/0048/6312/files/jozudigarunas.pdf
    • https://cdn.shopify.com/s/files/1/0428/7424/1183/files/99008565036.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3502/files/paviwodimezokeludulidi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5400/files/33224428808.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6437/files/49535472106.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1412/files/maguvidamanixan.pdf
    • https://cdn.shopify.com/s/files/1/0434/9932/3558/files/mivopimagu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/munofesepuvitixa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2152/3349/files/lunenelemololakupesuluvi.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/
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/daxiwozovujuj

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005faa.bin
71fa4fed72b40d6023687438ddfb57c7d89a3a7e8c7cf65c3866bcf706b6423b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAA 5512 bytes
font_01_sfnt_off000071b1.bin
6a5cd182eaf61964fd7629aa2ba420a259202f0c0be77e4db9574701bbb67860		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B1 11860 bytes

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