Malicious PDF — malware analysis report

Static analysis result for SHA-256 fffdd142a3d7680c…

MALICIOUS

PDF

41.1 KB Created: 2020-08-30 06:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6167cd5f9467b96d4d2544e54c17b991 SHA-1: b0c82016078e86344526e9db58aeb03c691475e3 SHA-256: fffdd142a3d7680c5a5c4058f8ce3fac3d6f5b901bc64b9606234898c2c33e06
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. Additionally, a PDF_SEO_LINK_FARM heuristic fired, revealing a large number of external PDF links embedded within the document. The primary malicious IOC is the redirector URL, which is likely used to funnel users to a compromised or malicious website. The document body contains garbled text but includes the suspicious URL and references to 'Doom argent tower classic map', possibly as a lure.

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=doom+argent+tower+classic+map
    • https://static.usrfiles.com/ugd/d55797_7b15eae5629942928505b1ea71d4d17b.pdf
    • https://static.usrfiles.com/ugd/18f527_c6e95702a58740d98e94bccb050871e1.pdf
    • https://static.usrfiles.com/ugd/20d83a_83f434d11e78436483276d8b75dbc0cb.pdf
    • https://static.usrfiles.com/ugd/b8c837_c959401c0ceb4e5ebe8ae4b67ebb1093.pdf
    • https://static.usrfiles.com/ugd/b8c837_3613a9d2513a4ce6bbefef911945bafe.pdf
    • https://static.usrfiles.com/ugd/b8c837_7eaebefef42b4d12b2474f6936f870e8.pdf
    • https://static.usrfiles.com/ugd/ecec20_1ba99c5734e84f2498ef84e4b5acd248.pdf
    • https://cdn.shopify.com/s/files/1/0429/9292/6883/files/pubuzutodetezudiwi.pdf
    • https://cdn.shopify.com/s/files/1/0460/9182/9412/files/3rd_grade_math_fractions_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/9452/3552/files/rca_digital_tv_converter.pdf
    • https://cdn.shopify.com/s/files/1/0430/7707/5108/files/lipukizujuwexuvolijapu.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_off0000639d.bin
8066a5fc57372a117915b9aabd0a5d8e9dd04824581e173fd6efc0fefecbce23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x639D 5344 bytes
font_01_sfnt_off000075cb.bin
af9ef5215e95eacb01310394b4d32990cb9499d91a909b1a7630fdd9cf964d27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75CB 10060 bytes

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