Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f25269155954a5c…

MALICIOUS

PDF

32.9 KB Created: 2020-08-21 01:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d9953942f5a1305e790c395bb2a546d SHA-1: b150aa6700d360733e410e7f8e06b9e896665242 SHA-256: 9f25269155954a5cfddcc7ab9c4d2558363b2bd2ef4c872952d3402bbbce4133
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing indicating a malicious redirector link. The primary malicious URL identified is https://ttraff.cc/pify?keyword=barish+special+status+video. The document body is heavily obfuscated, but the presence of numerous links, including those to Shopify domains and other unknown hosts, suggests a link farm or redirection strategy to deliver a secondary payload. The file was generated using wkhtmltopdf, which can be abused for malicious purposes.

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/pify?keyword=barish+special+status+video
    • http://files.howardssilverlabs.com/uploads/1/3/1/4/131407152/jimej_wonuzagowekil_rakisa_nogax.pdf
    • http://jewaraso.d-aleksandar.com/uploads/1/3/1/8/131856072/7fe695da2346.pdf
    • https://cdn.shopify.com/s/files/1/0465/1230/8382/files/51967634975.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/imprest_system_of_petty_cash_book.pdf
    • https://cdn.shopify.com/s/files/1/0440/2629/8533/files/filogipivukonej.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/51535471157.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/refitapobofubogiwimubik.pdf
    • https://cdn.shopify.com/s/files/1/0431/8068/7520/files/paxosovoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/40721003718.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/43002230958.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_off000044d7.bin
c27f4c5f7f78f0108a00bb1ab82ecd2d64ffe48b97d59510b1077f5e3b8f8ecc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44D7 5268 bytes
font_01_sfnt_off000056bd.bin
39e396e5a22ced6e0dcd396501775d6b43ed913e70fe21ee7ec5e924ec450462		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56BD 9472 bytes

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