Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6580cbcd0c5462…

MALICIOUS

PDF

41.9 KB Created: 2020-08-03 18:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2901aa8086529fbe1970b40c85c6dbd SHA-1: f75e527c443b048a799c866963b935ab48dacff9 SHA-256: 1f6580cbcd0c5462c52891810a4d50d0fb2a082c142bec2994f746901da7a7c6
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, designed to trick users into downloading further content under the guise of a free book. The ML classifier strongly indicated maliciousness. The primary attack vector appears to be a link farm designed for SEO poisoning, leading to potentially harmful downloads.

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=risk+management+and+insurance+book+pdf+free+download
    • http://files.andrewriceart.com/uploads/1/3/0/8/130874210/begisibavexisa.pdf
    • http://files.oddsandendsphoto.com/uploads/1/3/1/8/131856247/8f34ba3f013be.pdf
    • http://files.zardie.com.au/uploads/1/3/1/3/131379923/nipomi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/ginotimigex.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8664/files/76078424571.pdf
    • https://cdn.shopify.com/s/files/1/0435/4634/5640/files/45296021651.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/58565603882.pdf
    • https://cdn.shopify.com/s/files/1/0434/8208/7588/files/sodunesevikozaxov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86662201832.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/bol_bachchan_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0430/4135/7973/files/25694512941.pdf
    • https://cdn.shopify.com/s/files/1/0433/7834/4085/files/6812155704.pdf
    • https://cdn.shopify.com/s/files/1/0434/6780/0736/files/boston_augustana_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/1060/5735/files/70291736540.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/1191123273.pdf
    • https://cdn.shopify.com/s/files/1/0440/8446/1720/files/mamurejov.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/wekiwegoseroxijovana.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_off00006489.bin
ff185c82bbe32bb44c457e39d25fb44d728b72e6058fe87c9e0bc50ba6a1f95d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6489 5776 bytes
font_01_sfnt_off00007837.bin
003852fda4ceb50a7c4b7a685101d6999d83743e781c4209d4d701a45ec7ece0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7837 10040 bytes

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