Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a61d95eee3e61af…

MALICIOUS

PDF

33.1 KB Created: 2020-08-04 23:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78b38b59c897d40ed15a7198479b9389 SHA-1: ed482958d5512034420cbfe757911a9d8cd08c3c SHA-256: 8a61d95eee3e61af599336d0ddd72cf7fd87be5fb103b680b0ade363862f1376
120 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, with one identified as a known malicious redirector. The document body appears to be malformed or corrupted, but the presence of numerous links, including one pointing to `https://ttraff.ru/pify?keyword=burhan+bungin+metode+penelitian+kualitatif+pdf`, strongly suggests a phishing or malware distribution attempt. The file was generated by wkhtmltopdf, a tool often abused for creating malicious documents.

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=burhan+bungin+metode+penelitian+kualitatif+pdf
    • http://files.tennisunderthestars.net/uploads/1/3/1/4/131406535/22340256.pdf
    • http://files.fieryoverforty.com/uploads/1/3/2/6/132681851/leserazugujiduxi.pdf
    • http://files.morethantourism.com/uploads/1/3/1/6/131607404/zunesawekadi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/34587532532.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dagezaluvonanapukinuwit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pesaveput.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/sidetikusofekiwegegiz.pdf
    • https://cdn.shopify.com/s/files/1/0439/3671/0824/files/judifeto.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ropuxikasafomudixaxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3969/4741/files/cablevision_remote_codes.pdf
    • https://cdn.shopify.com/s/files/1/0437/7300/1877/files/86575105171.pdf
    • https://cdn.shopify.com/s/files/1/0437/5258/7415/files/nideramekorasamator.pdf
    • https://cdn.shopify.com/s/files/1/0433/6146/8574/files/fizizetefozosalorobila.pdf
    • https://cdn.shopify.com/s/files/1/0428/9249/2963/files/20222377182.pdf
    • https://cdn.shopify.com/s/files/1/0431/1751/0818/files/50337388852.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_off00004581.bin
97db66edcab53fb95e63ee986c1eb9bb4d592efe3410559f147094aadc4dcfe4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4581 5528 bytes
font_01_sfnt_off00005825.bin
c5eec70ae7fca5d7b88eeb74a2a3550d11bcbf8b2ebfbb80b4921e91a810d421		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5825 9176 bytes

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