Malicious PDF — malware analysis report

Static analysis result for SHA-256 c20972d648f78eca…

MALICIOUS

PDF

40.4 KB Created: 2020-08-01 23:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d882656845fd1bdc53c662db2cd2ef0f SHA-1: 829da2e622d8caa047173a7d5ced43874bc8417e SHA-256: c20972d648f78eca7f3d9bef654a5ba90259a368dfc0edaf0d00f0de99335d18
140 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, masquerading as a Google Wifi reset prompt. It also exhibits characteristics of a link farm, with numerous embedded links pointing to external PDFs. The document body, though heavily obfuscated, contains the malicious URL and appears to be designed to trick the user into clicking it.

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=reset+google+wifi
    • http://files.marioamutis.com/uploads/1/3/2/7/132741110/gufevagewefego.pdf
    • http://files.conleysmartialarts.net/uploads/1/3/2/6/132695574/lixonijomemiv.pdf
    • http://files.writing4content.com/uploads/1/3/0/7/130776433/zogageluvofolebot.pdf
    • https://cdn.shopify.com/s/files/1/0432/9881/6160/files/kafam.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/bipodutugina.pdf
    • https://cdn.shopify.com/s/files/1/0433/2073/7950/files/63345635861.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18842325712.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19252536586.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/nokitidexojixajozojuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/1862/3896/files/bifofijagurulelowufomu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0895/8362/files/latobab.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6412/files/lekojizixudesewe.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/91727296311.pdf
    • https://cdn.shopify.com/s/files/1/0436/0998/1085/files/92623712193.pdf
    • https://cdn.shopify.com/s/files/1/0430/8362/8708/files/299308844.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/72003684551.pdf
    • https://cdn.shopify.com/s/files/1/0428/9350/8771/files/bajimiragazugadupiwiwaf.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_off0000626c.bin
9b288cd12eecfd613cd9b92392eaa8f69b07febb4c3d066d227e8a14107ff6f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626C 4728 bytes
font_01_sfnt_off000072b7.bin
6b9d5a9b52757eef6c29c61ea31b24d44f1cb40bb76a6d1b0afb0e6802e9a109		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B7 10008 bytes

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