Malicious PDF — malware analysis report

Static analysis result for SHA-256 efb457471e327c30…

MALICIOUS

PDF

35.7 KB Created: 2020-08-25 06:39:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c73c1203324600310ebf6a25073b457 SHA-1: e30d123b2a29b424bd170e2179ba4a959423a606 SHA-256: efb457471e327c30026bf333ab9e72b736c1c706f367bf37857aecb97b80750f
160 Risk Score

Malware Insights

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

The PDF contains a lure for remote support tools, instructing the user to install or connect with such software. It embeds a link to a malicious redirector, ttraff.ru, which is likely used to deliver the actual payload. The PDF also contains a large number of links to other PDFs hosted on Shopify, potentially for SEO manipulation or to obscure the malicious redirector. No scripts were extracted from this sample.

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.ru/pify?keyword=teamviewer+quicksupport+mac
    • http://files.thriveoctherapy.com/uploads/1/3/1/4/131453453/seluv.pdf
    • http://files.nostroviatowriting.com/uploads/1/3/1/4/131453267/47ec52b9deeb491.pdf
    • https://cdn.shopify.com/s/files/1/0435/4582/1333/files/83750597311.pdf
    • https://cdn.shopify.com/s/files/1/0433/9744/7831/files/49073944297.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/5175462134.pdf
    • https://cdn.shopify.com/s/files/1/0431/9405/6861/files/ortopedia_maxilar_integral_camilo_hurtado.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1786/files/21200987072.pdf
    • https://cdn.shopify.com/s/files/1/0437/8961/5266/files/tumafajal.pdf
    • https://cdn.shopify.com/s/files/1/0432/1057/1940/files/aua_guidelines_prostate_biopsy_antibiotic.pdf
    • https://cdn.shopify.com/s/files/1/0432/3685/1874/files/sdgs_4.pdf
    • https://cdn.shopify.com/s/files/1/0432/3681/9104/files/suzuki_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/55653003060.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_off00004e6a.bin
3bf056a8ce500572d527d6415ad5174b7c5c98a609b390abd1e907ead2b4c7ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E6A 5340 bytes
font_01_sfnt_off00006098.bin
d154c3a94d97b307d0e1b8e1c6d68bf01c2a9db37f9c7b6e72131a7b93520ce7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6098 9848 bytes

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