Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5cde96a3a7ee3b0…

MALICIOUS

PDF

37.9 KB Created: 2020-08-16 11:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fec2b9fbd59a60da131a9cfb3028872b SHA-1: d8d99167ed7d07c72177221183858fb4bde3ce14 SHA-256: d5cde96a3a7ee3b0f9a6e8d1c6c2a72f094e0ec0da4c7ff7c6b648c78f0c57b8
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 links, with a critical heuristic firing indicating a link farm. One of the primary links directs to a known malicious redirector service (ttraff.cc), which likely serves to obscure the ultimate malicious destination. The document body itself is heavily obfuscated and contains the same redirector URL and numerous other PDF links, many hosted on Shopify, suggesting a coordinated effort to distribute malicious content or phishing lures.

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=ajedrez+reglas+pdf
    • http://files.renew-wellness-center.com/uploads/1/3/0/7/130776452/fuzaduxudiv.pdf
    • http://bubiz.magentawilde.com/uploads/1/3/1/4/131406390/605733325eb2afe.pdf
    • http://niwuk.emilyannhill.com/uploads/1/3/1/3/131379362/4207554.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/9421246172.pdf
    • https://cdn.shopify.com/s/files/1/0437/7395/2158/files/71331231456.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9575/files/31006774017.pdf
    • https://cdn.shopify.com/s/files/1/0433/2234/3577/files/queen_loft_bed_plans.pdf
    • https://cdn.shopify.com/s/files/1/0443/0426/9468/files/suvukezal.pdf
    • https://cdn.shopify.com/s/files/1/0429/0114/3715/files/11494541857.pdf
    • https://cdn.shopify.com/s/files/1/0429/2558/8639/files/bareilly_ki_barfi_movie_hd_filmywap.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_off00005715.bin
41ffe42c28eec406c77292e397c7039dc3ebf4c9ac0f4ee29d5ac8aa175d0a53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5715 5324 bytes
font_01_sfnt_off00006954.bin
d17dc54b22883811a23282b0f470693f3baecc5ec4ffb7521b9213365c50891b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6954 10508 bytes

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