Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09bdddf3ee9ceb5…

MALICIOUS

PDF

51.0 KB Created: 2020-09-02 06:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a57963529ce18c49762bf9f2660e53d7 SHA-1: 20e15aa0e371a1ec30e178459b7ad4bb4a64fe7f SHA-256: a09bdddf3ee9ceb57fa7e5e85f45eae8e23052e27ac9501d883b7b1b1d23a0aa
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is ttraff.link, which is used to redirect users to content related to 'vsco filters for lightroom free'. This suggests a social engineering lure to drive traffic to potentially malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/wix?keyword=vsco+filters+for+lightroom+free
    • https://static.usrfiles.com/ugd/b8c837_1a0088304dd743208e9aae5d234ebfd4.pdf
    • https://static.usrfiles.com/ugd/f65518_3884731b2bad402d9862540fc95b9cd4.pdf
    • https://static.usrfiles.com/ugd/b8c837_1419d63d92f34f3ca6cab4cd2a702b00.pdf
    • https://static.usrfiles.com/ugd/79cb75_b47ef46a81984dc280cd7572c4160940.pdf
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/69062702507.pdf
    • https://cdn.shopify.com/s/files/1/0431/1711/7589/files/72623371230.pdf
    • https://cdn.shopify.com/s/files/1/0437/0019/1387/files/begofigolewelamul.pdf
    • https://cdn.shopify.com/s/files/1/0433/8309/5452/files/holes_character_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0429/2925/8649/files/gomaseluwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5806/0703/files/blender_models_for.pdf
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/megeriregugo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8673/3727/files/vunaxomamunufexete.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0807/files/6802152909.pdf
    • https://cdn.shopify.com/s/files/1/0462/2958/6069/files/carrier_primeline_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/9002/7430/files/airnet_piping.pdf
    • https://cdn.shopify.com/s/files/1/0432/1945/2063/files/blendr_dating_app_apk.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_off00008977.bin
17609ffc325b88008e0d1d72fa5f21aefa48eeb2f6034f39c5ac564eb4543f3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8977 5052 bytes
font_01_sfnt_off00009a87.bin
7b27d5c86795050800dcc71d719785433ef4e9d511faf35dd8f302da8194e7d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A87 10660 bytes

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