Malicious PDF — malware analysis report

Static analysis result for SHA-256 b119fee935514cfe…

MALICIOUS

PDF

47.9 KB Created: 2020-08-30 19:39:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e24a1828644b96e051a596452bc774b SHA-1: 2f0a7351f28e16e51bb1ad0f112b4210b3956327 SHA-256: b119fee935514cfee058de8c79ce359ede859990453e7419157614420311ebaa
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for '3ds max 2020 tutorial for beginners'. The PDF also hosts a large number of external links, many of which point to benign content, suggesting a link farm used to obscure the malicious redirector.

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.cc/wix?keyword=3ds+max+2020+tutorial+for+beginners
    • https://static.usrfiles.com/ugd/c3f88d_ce689e6ef0894c02a1b7536611d11238.pdf
    • https://static.usrfiles.com/ugd/b8c837_5182941cd8684036b6e0e4b4ad047ed1.pdf
    • https://static.usrfiles.com/ugd/b8c837_46a560164ed24750b3b965e884e7aac6.pdf
    • https://static.usrfiles.com/ugd/8e1900_9b6930bbf5fd497cbafac0436383b700.pdf
    • https://static.usrfiles.com/ugd/cb4a18_ca4fa435f3b146c7b1bcd20828d2e105.pdf
    • https://cdn.shopify.com/s/files/1/0435/6515/4463/files/new_bollywood_songs_audio_2017.pdf
    • https://cdn.shopify.com/s/files/1/0431/1721/5905/files/lirixunuzevo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3795/7023/files/13351168927.pdf
    • https://cdn.shopify.com/s/files/1/0429/1208/8231/files/bazikaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/rekikorav.pdf
    • https://cdn.shopify.com/s/files/1/0430/5967/5293/files/78145337655.pdf
    • https://cdn.shopify.com/s/files/1/0440/4979/3189/files/xomakigiz.pdf
    • https://cdn.shopify.com/s/files/1/0439/3045/2123/files/37081187227.pdf
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/78636460337.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7134/files/aho_ni_aho_song.pdf
    • https://cdn.shopify.com/s/files/1/0463/4856/6690/files/bedugofikatofosofo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3551/6318/files/vugexowimasoleki.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_off00006f00.bin
e6b2bfb62aab9bf8c0caa77c11131000e79d3d5e75e74a2e489dfb7a5cd0b92a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F00 5660 bytes
font_01_sfnt_off0000821f.bin
06036300b48c90009af789655d55df20e5b5882e35f373b42ad7a31fc3e02176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x821F 10252 bytes
font_02_sfnt_off0000a484.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA484 4324 bytes

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