Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d8e4fdc84bbe5e…

MALICIOUS

PDF

33.4 KB Created: 2020-08-17 06:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac376d2232a26d1afdc977d65511553a SHA-1: 45fb46b001c1c7b1807045bad076b76f700d62c7 SHA-256: 32d8e4fdc84bbe5e9596668b94650e32a2b2436363ba8680f96a9381d69a3378
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a character profile worksheet, suggesting a lure to disguise the malicious intent. The primary malicious IOC is the redirector URL, which likely leads to further stages of an attack.

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.cc/pify?keyword=character+profile+worksheet+for+grade+4
    • http://files.jenkinspng.com/uploads/1/3/2/7/132740525/2588870.pdf
    • https://cdn.shopify.com/s/files/1/0430/6072/3865/files/zezedewapexidejelug.pdf
    • https://cdn.shopify.com/s/files/1/0431/5942/1092/files/xonopiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/65589046415.pdf
    • https://cdn.shopify.com/s/files/1/0437/6998/7223/files/67836395445.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0549/files/sesozonaxaxegopoboz.pdf
    • https://cdn.shopify.com/s/files/1/0436/2525/0974/files/14022572215.pdf
    • https://cdn.shopify.com/s/files/1/0429/0582/9532/files/9750445311.pdf
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/gomaxisirimifagiror.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/kuzoxubekasonivanib.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/waxuzakelumolefize.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7614/files/gemuteluvotelutaras.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_off000045f8.bin
a3397ade94767b4520343c8cc217bf398291aa2416fa3cfe7fa147547f14db02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45F8 5568 bytes
font_01_sfnt_off000058f5.bin
8758b2bc60f5c3317455770b63a84c2cd47694bf5d8865f3e73cf73b331aabac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F5 9356 bytes

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