Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b9d518725fddb80…

MALICIOUS

PDF

42.9 KB Created: 2020-08-25 11:25:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8d10608ebdf17460942c973645c3599 SHA-1: 910920f215dfadb685f09a1247f17818d594bb5f SHA-256: 9b9d518725fddb80da4ff5242300f120de88b89c2e72b130b477a92eea9af44c
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily corrupted, contains text suggesting a lure related to 'The greatest showman 2017 movie guide worksheet'. The PDF also contains a large number of external links, many hosted on cdn.shopify.com, which is flagged as a PDF link farm. The primary malicious IOC is the redirector URL.

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.ru/pify?keyword=the+greatest+showman+2017+movie+guide+worksheet
    • http://files.ftscwomensindoorcup.com/uploads/1/3/1/6/131606186/dijovizorabesepude.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5897/files/puligu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/73194980514.pdf
    • https://cdn.shopify.com/s/files/1/0437/7657/3601/files/34334645319.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/80744218958.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/68084212497.pdf
    • https://cdn.shopify.com/s/files/1/0428/8525/1235/files/guided_meditation_script.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/20221499973.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/64570332321.pdf
    • https://cdn.shopify.com/s/files/1/0435/4618/1787/files/pumubofusefakun.pdf
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/investment_banker_resume.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/polof.pdf
    • https://cdn.shopify.com/s/files/1/0435/9107/3947/files/20852540715.pdf
    • https://cdn.shopify.com/s/files/1/0437/1175/8491/files/analysis_of_financial_statements_dk_goel_solutions.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_off000065f0.bin
0c48b9b54e55c4f4bb6b1d533770637b03679b7a535fabfc7ec7ddd6c0a677a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F0 5780 bytes
font_01_sfnt_off000079a4.bin
0b827b6300c4f56d5bc49bcccb99c7c8b3916b6cafb07021f3dad00c7f67b02c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A4 10792 bytes

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