Malicious PDF — malware analysis report

Static analysis result for SHA-256 91e5ba48b3443538…

MALICIOUS

PDF

34.8 KB Created: 2020-08-20 01:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66ef3d334794077f9ad58bb5104d1030 SHA-1: 1ba7a75e5d9713a8fe0fd1c0cd55671d56f40599 SHA-256: 91e5ba48b3443538b754e2e90f689dc7f76bf0a1d5219a125f3f7d254210dc7e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a lure for remote support tools, instructing the user to install or connect with such software. It also contains a mass external PDF link farm, with the primary redirector URL pointing to known malicious infrastructure. The embedded URL https://ttraff.com/pify?keyword=teamviewer+7.+0 is likely part of a phishing or malware distribution chain.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=teamviewer+7.+0
    • http://dewesidu.rolanddescombes.net/uploads/1/3/0/7/130775734/047f5e8f.pdf
    • http://wuxuz.weiratherdesigns.com/uploads/1/3/2/6/132681670/2133658.pdf
    • http://files.gftrails.ca/uploads/1/3/1/4/131406827/vowosibajitelolavi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5040/0920/files/94714983241.pdf
    • https://cdn.shopify.com/s/files/1/0433/0569/7440/files/9408771420.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/naxemujug.pdf
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/laziximanumoxulixomama.pdf
    • https://cdn.shopify.com/s/files/1/0431/0931/8813/files/42153721879.pdf
    • https://cdn.shopify.com/s/files/1/0437/0386/1416/files/cambridge_igcse_ict_2nd_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6873/5140/files/11309751823.pdf
    • https://cdn.shopify.com/s/files/1/0451/2713/9482/files/subgeneros_del_genero_lirico.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/muvobazixanivapud.pdf
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/vozezedatilupevulum.pdf
    • https://cdn.shopify.com/s/files/1/0430/7707/5108/files/kupovolifezufi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c8c.bin
3c6567dfadc0dbea30815311ee4c7c8850c06a78af8fef7609fd328a120029d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C8C 4976 bytes
font_01_sfnt_off00005d85.bin
cf191d5a315e2d67849cb7f4f8874dff565c70ade8fda57ae708fd811d14a3e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D85 9752 bytes

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