Malicious PDF — malware analysis report

Static analysis result for SHA-256 f767bba4c73451f2…

MALICIOUS

PDF

37.9 KB Created: 2020-08-28 21:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 486b641a5f53c83aaeada52e8442278d SHA-1: cdff8112257f95a5b165cbcda4caa984a9443939 SHA-256: f767bba4c73451f292ace87a3b4585b330ef02da25f2a0c537009e35f22fbb85
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating it's a malicious redirector. One of the primary links, 'https://ttraff.cc/wix?keyword=layers+of+the+atmosphere+webquest', is flagged as malicious. The document also exhibits characteristics of a link farm, with numerous links pointing to external PDFs, suggesting a broader campaign to distribute malicious content or engage in SEO manipulation for malicious purposes. The presence of a large number of PDF links, many hosted on cdn.shopify.com, indicates an attempt to blend in with legitimate content while directing users to malicious infrastructure.

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/wix?keyword=layers+of+the+atmosphere+webquest
    • https://cdn.shopify.com/s/files/1/0431/1384/0794/files/sofamedomisoxunadevila.pdf
    • https://cdn.shopify.com/s/files/1/0453/8574/4552/files/18595220773.pdf
    • https://cdn.shopify.com/s/files/1/0439/6145/0654/files/cell_cycle_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9390/files/zolijopokoviduwagazof.pdf
    • https://cdn.shopify.com/s/files/1/0451/3703/5429/files/asexual_reproduction_test.pdf
    • https://cdn.shopify.com/s/files/1/0450/1327/0692/files/verolejiva.pdf
    • https://cdn.shopify.com/s/files/1/0438/4089/7184/files/88883003908.pdf
    • https://cdn.shopify.com/s/files/1/0431/8468/5220/files/grand_exchange_fairy_ring.pdf
    • https://static.usrfiles.com/ugd/b8c837_564a652eb83b4f5a923aa5e0bee86d9a.pdf
    • https://static.usrfiles.com/ugd/b8c837_fcc0cc1e0227497490770403dbc9ede9.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a844f21c1624ec0968bceebf0a1ccdb.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8529f23e5684facae91fdc610ea223f.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_off000055dc.bin
5a6e085a3439baae5f616a33269815d53e541d155b4caaa1e51eb9b0a4c01897		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55DC 5508 bytes
font_01_sfnt_off00006891.bin
753ee51d0cc58b3a54a74ed8e253498e8b1f32a119299ce6cde476a6de24b8f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6891 10196 bytes

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