Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e8195e2bc61016…

MALICIOUS

PDF

53.3 KB Created: 2020-08-31 02:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00f08ef13efcd102aa6fd0b9b3684a26 SHA-1: 25cd36ce0d5059bc6dfe3d9d5c13bb08e4d1b83c SHA-256: 55e8195e2bc610160717c9ae64201e46c942aa582bfaacf05023085616aebc54
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, characteristic of a link farm. One of these links directs to 'ttraff.com', which is flagged as a known malicious redirector. The presence of numerous external PDF links suggests an attempt to distribute or obscure malicious content through a network of related documents. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the direct user-facing content.

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.com/wix?keyword=ponte+de+macarr%2525C3%2525A3o+em+arco+passo+a+passo
    • https://static.usrfiles.com/ugd/accd1f_16454b4aa0614e7d8e6a8943b4bcd639.pdf
    • https://static.usrfiles.com/ugd/8b2c09_72b98f47b7dc40c798b524b342d9bd3f.pdf
    • https://static.usrfiles.com/ugd/e4ff69_09d45783a3bf406c88a7c0dbe3bd1b41.pdf
    • https://static.usrfiles.com/ugd/b8c837_eae511e1d280401e82e865bf8488f0b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ebb990a82c140de998cf1f85cacf811.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_ae3e12c91ac04c7f9bba209f76674d37.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_b88e303b583d4c8788cb2c06e10b0aaf.pdf
    • https://static.usrfiles.com/ugd/b8c837_98506268603e48a28eca9bdc54a1166a.pdf
    • https://static.usrfiles.com/ugd/b8c837_2cdfb3aa930b43659eda54004d84a4b3.pdf
    • https://cdn.shopify.com/s/files/1/0429/2427/7927/files/32248683344.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99231100330.pdf
    • https://cdn.shopify.com/s/files/1/0433/9525/2374/files/wirelanewojigupezo.pdf
    • https://static.usrfiles.com/ugd/d4da64_2ad155a685cb4fb1a997c574aa33fe2f.pdf
    • https://static.usrfiles.com/ugd/10e3af_d4d75612454740679b2dbe683bd21e46.pdf
    • https://static.usrfiles.com/ugd/b8c837_dcb4040d378c476382d98bd3c5bd691b.pdf
    • https://static.usrfiles.com/ugd/06497e_453cb91717c5498b89aaf44569c487ff.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074cc.bin
23136a5cb189519a6e5318f8fc7b541bf11e86cbd304a1285c429284897b983d
pdf-font-stream PDF embedded font (sfnt) at offset 0x74CC 5508 bytes
font_01_sfnt_off000086d0.bin
a67689ae50f6d8272ecab930a6dc95946fb5f10019d65ea1873ecd5af27ceaf4
pdf-font-stream PDF embedded font (sfnt) at offset 0x86D0 12272 bytes
font_02_sfnt_off0000ad99.bin
df51e7a96bac719efb9735d4dc28c2abd92beaec5a43e6618c9e35307a8eb447
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD99 16904 bytes