Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d1a72cd29f6797…

MALICIOUS

PDF

41.3 KB Created: 2020-08-15 05:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6afd6c03ba2e5e848945dadaa1a6f7a5 SHA-1: 20801c8c27a25cd275a0fbcdaca30a19acdc4a8b SHA-256: f7d1a72cd29f6797b0c60956821a783968fb6900e147fdb35a154cbfa9242132
120 Risk Score

Malware Insights

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

The PDF contains a prominent link that, when clicked, redirects to a malicious URL disguised as information about WhatsApp backups. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the redirection to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on cdn.shopify.com, suggesting a link farm designed to attract traffic. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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/pify?keyword=whatsapp+backup+from+android+phone+to+iphone
    • http://files.twinbaysforum.org/uploads/1/3/1/3/131398131/fazesisen-jawerulumigoro-vexasugiviged-weguxa.pdf
    • http://tiwiw.gener8businessltd.com/uploads/1/3/0/8/130874493/waxekibodaziwabegi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8336/5528/files/sisamefa.pdf
    • https://cdn.shopify.com/s/files/1/0436/3055/9390/files/94036421814.pdf
    • https://cdn.shopify.com/s/files/1/0433/8669/9925/files/18753391088.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/19826764751.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0314/files/dark_mode_mac_os_high_sierra.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/31485107268.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/xilenezoda.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6055/files/carranza_periodontologia_clinica_9_edicion.pdf
    • https://cdn.shopify.com/s/files/1/0459/6485/3408/files/alliance_data_systems_corporation_annual_report_2018.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_off000063b0.bin
c2fcda53c98c1f7f357fc5b5973403d879860092c3e32172783a53734d1225f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B0 5580 bytes
font_01_sfnt_off00007684.bin
db88212539cd97c6f19960715e9f7d47bb60a0cf52078b2504fb253b8396f603		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7684 9964 bytes

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