Malicious PDF — malware analysis report

Static analysis result for SHA-256 c86e352e28b265f7…

MALICIOUS

PDF

33.2 KB Created: 2020-08-13 13:37:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62fdfc28451dc8919bb026d6e35ffda1 SHA-1: 2e1a06866e00cd67be942826e7c0b30dc90d6e79 SHA-256: c86e352e28b265f79a25ca238f538d455f34240b8266d8226fed85321a854662
120 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to appear as search results for a financial textbook. The primary link, 'https://ttraff.com/wb?keyword=shreve%20stochastic%20calculus%20for%20finance%201%20pdf', is identified as a malicious redirector. This indicates a phishing or social engineering attack aiming to direct users to harmful content. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a malicious intent.

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.com/wb?keyword=shreve%20stochastic%20calculus%20for%20finance%201%20pdf
    • http://files.greenbushhistoricalsociety.org/uploads/1/3/1/8/131856498/fagudoreraz-duzovafegimem.pdf
    • http://files.sebastienlavoue.net/uploads/1/3/0/9/130969855/5431779.pdf
    • http://files.radonchamber.com/uploads/1/3/1/4/131406841/9079892.pdf
    • http://files.monaconsulting.com/uploads/1/3/1/4/131437443/gunamodusisimox-nibarexebuf.pdf
    • http://files.liveplayband.com/uploads/1/3/1/8/131871650/bd6b6eda722.pdf
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/33114241571.pdf
    • https://cdn.shopify.com/s/files/1/0450/1949/6606/files/99408611376.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/tds_rate_chart_assessment_year_2020_20.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kesutuzijakakewinepubad.pdf
    • https://cdn.shopify.com/s/files/1/0431/6489/3345/files/74713190456.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/71991815397.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/mepemukanamibeg.pdf
    • https://cdn.shopify.com/s/files/1/0450/9057/0405/files/dnd_5e_char_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/6117/4684/files/zovemis.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1029/files/15242820693.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.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_off0000469c.bin
69061ef9af1765c6075b0e222d45647a9c1cbc7f2a57521f8d98360e00be16cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x469C 5456 bytes
font_01_sfnt_off0000592b.bin
34e2a24f480da29b8a77a82e32dbb59f6bb7043ea265d88cf1c88be1b856f1a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x592B 8968 bytes

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