Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f8a8d4a3e3599e…

MALICIOUS

PDF

42.5 KB Created: 2020-08-29 17:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1bc6c458fad9190eb4843726691ff54 SHA-1: 4605ecd2684e3e18c99191b3ecc905e87c1b655e SHA-256: 45f8a8d4a3e3599e92488592fec8067e9775d5150eeab08e05e25b352268c8f1
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=job+offer+acceptance+email+with+cond'. This URL is presented within the document body, suggesting a social engineering lure related to a job offer. The PDF also exhibits characteristics of a link farm, with numerous external links, further supporting the malicious intent of redirecting users to potentially harmful sites.

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=job+offer+acceptance+email+with+cond
    • https://cdn.shopify.com/s/files/1/0462/4275/8807/files/eicr_codes_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/8656/8860/files/vevewerunekamabul.pdf
    • https://cdn.shopify.com/s/files/1/0436/7984/2457/files/26363105598.pdf
    • https://cdn.shopify.com/s/files/1/0428/7492/9319/files/xixadolato.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/bodybuilding_12_week_cutting_diet_plan.pdf
    • https://cdn.shopify.com/s/files/1/0429/2100/1119/files/45995646173.pdf
    • https://cdn.shopify.com/s/files/1/0433/5111/3883/files/10134253792.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2bacb699132473b95a56e6745e9b6dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_e981f0564dc942ea90d5373a1c1608a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_036edfe4fecf43169e19388be727cec1.pdf
    • https://static.usrfiles.com/ugd/b8c837_389059187d1540128dd43bb3af467f14.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b9fdc66ea114b9685bcfc0fda0482bd.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/
    • https://cdn.shopify.com/s/files/1/0429/2100/1119/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068dd.bin
8388842042d8eed43a8b1cee0745430853989d11dd59bf789c5d15ec16effa39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68DD 5436 bytes
font_01_sfnt_off00007b39.bin
dfe62b055937413b8c7bc0d81775ad9c5bd87da9109abfb8025e769604fb4ce4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B39 9892 bytes

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