Malicious PDF — malware analysis report

Static analysis result for SHA-256 50cb3b6f1e178214…

MALICIOUS

PDF

59.1 KB Created: 2020-08-31 07:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c36f44fb1a0873df89f9ad1f6501758a SHA-1: 96261f11edc7cf1a7ca7150004180f89310d2027 SHA-256: 50cb3b6f1e1782143e19bba58ccb215279ce4b8456376de0e9fae37c7362d49b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple heuristics indicating malicious intent, including a critical finding of a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. The presence of a PDF link farm suggests an attempt to leverage SEO for traffic redirection, likely to distribute malware or conduct phishing. No scripts were extracted from this sample.

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=data+structures+and+algorithms+in+c
    • https://cdn.shopify.com/s/files/1/0434/0098/6787/files/86840191204.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6157/files/1350720450.pdf
    • https://cdn.shopify.com/s/files/1/0428/6860/5095/files/software_agreement_contract.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6099/files/abbyy_to_word_converter_crack.pdf
    • https://cdn.shopify.com/s/files/1/0428/8941/2764/files/national_achievement_test_reviewer_for_4th_year.pdf
    • https://static.usrfiles.com/ugd/628a76_781eb0d47eb943cb923edba7903490ca.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cb7a68ba40f40898af76c2d6bd1c429.pdf
    • https://static.usrfiles.com/ugd/ca300b_44f1dca78b4d4ee8bb0c0007feb94d32.pdf
    • https://static.usrfiles.com/ugd/ce14f3_4d5f55da1a8846ac926e7edfdccf3860.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/28728376134.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2563/files/exercices_accords_toltques.pdf
    • https://cdn.shopify.com/s/files/1/0437/6880/7586/files/mm_dd_yyyy_format.pdf
    • https://cdn.shopify.com/s/files/1/0432/3554/1151/files/66052891889.pdf
    • https://cdn.shopify.com/s/files/1/0429/5101/6614/files/66971487541.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_off00009a95.bin
793e6cae4c0b4073feed18aee5faba27b66a378d3742e49bd1fce964b5d44763		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A95 5236 bytes
font_01_sfnt_off0000ac28.bin
9052b0061257413bf71156813a001d1108bd6a7a0cade20e3e0a3c5261202106		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC28 10844 bytes
font_02_sfnt_off0000d0db.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DB 4324 bytes

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