Malicious PDF — malware analysis report

Static analysis result for SHA-256 820be779335cc6bc…

MALICIOUS

PDF

33.8 KB Created: 2020-08-09 20:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8299c057844b9242932d092512d36074 SHA-1: 67dc83d1ea1fd1abbf32d0009895ba39ec8df119 SHA-256: 820be779335cc6bc90edbbee126c2a12832ff7bebd6434596a73aff5c1c3e83c
120 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 large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=software+architecture+in+practice+pdf+download', is identified as a malicious redirector. This suggests the document is designed to trick users into clicking malicious links, likely leading to further compromise.

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.ru/pify?keyword=software+architecture+in+practice+pdf+download
    • http://files.gradeseven.nestmusic.org/uploads/1/3/2/6/132681891/zezipipit.pdf
    • http://files.listingagentofatl.com/uploads/1/3/1/6/131607131/397860.pdf
    • http://files.ritaparadisfineart.com/uploads/1/3/0/9/130969461/segirilataseb.pdf
    • http://files.addycakescookies.com/uploads/1/3/1/4/131452804/xudeva-dokimesuge.pdf
    • http://files.slikslymusic.com/uploads/1/3/0/9/130969176/7479971.pdf
    • https://cdn.shopify.com/s/files/1/0436/0221/5074/files/tibuxenumesunu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7936/7845/files/91590826861.pdf
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/fasajigenapoxagebigofe.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6918/files/18985813740.pdf
    • https://cdn.shopify.com/s/files/1/0434/2988/8161/files/medicare_benefit_policy_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/4954/1013/files/acquisitions_incorporated_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/8647/8489/files/ov_guide_adult.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/niligowijejolivomuwaluzid.pdf
    • https://cdn.shopify.com/s/files/1/0432/7328/9894/files/how_to_start_a_blog_business.pdf
    • https://cdn.shopify.com/s/files/1/0428/9177/2063/files/sap_basis_course_content.pdf
    • https://cdn.shopify.com/s/files/1/0434/5056/4773/files/67118851407.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_off000048eb.bin
a3138637937aacf8fec5d83f03c41b35cbe0819c8b248c6c164444e14725bd87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48EB 5260 bytes
font_01_sfnt_off00005adc.bin
f77ca78bd3c03229bbebc4890a2858f71d3b05526fa4cc05904c14e8468f49fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ADC 9164 bytes

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