Malicious PDF — malware analysis report

Static analysis result for SHA-256 f93006d17b8bad57…

MALICIOUS

PDF

77.9 KB Created: 2020-08-15 11:34:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25cbec6b14bb0ac7d2eab8513439a3a1 SHA-1: 849b48efb7e07e5d98bcd28903640c1260388b1f SHA-256: f93006d17b8bad576c615d7d88bff72dd23f616a007f3e37014cfd63dcc520c0
130 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a download button, aiming to lure users to a malicious website. The document body also contains the same malicious URL and a benign-looking Shopify URL, likely part of a link farm to improve SEO for malicious content. The presence of a malicious redirector and the SEO link farm indicate a phishing or scam attempt.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=convert%20kindle%20to%20pdf%20windows%2010
    • http://nixej.jennypearlsboutique.com/uploads/1/3/2/8/132814930/f1309f8f3c4f3.pdf
    • https://cdn.shopify.com/s/files/1/0433/9512/1319/files/6479674429.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/bamukukaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/1308/7142/files/kuxezaluduba.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3701/files/carrier_reefer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/65605018282.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/guided_imagery_relaxation_script_forest.pdf
    • https://cdn.shopify.com/s/files/1/0438/8156/2280/files/book_icon_vector_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/2655/4780/files/seventh_day_adventist_fundamental_beliefs_28.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/vonek.pdf
    • https://cdn.shopify.com/s/files/1/0446/9784/5913/files/bhagavad_gita_in_kannada_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5593/0783/files/7664683219.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_off0000f582.bin
2c945b1b6070dda2dac7a71363595770fdeb75050804a170e2a9df97ca5077ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF582 5140 bytes
font_01_sfnt_off00010731.bin
674ad026b48e4df8d3250e7dea02b7da51059ab3abe2cccf5942418a7a0e63e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10731 10376 bytes

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