Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf77c0832e86a91…

MALICIOUS

PDF

64.6 KB Created: 2020-08-14 20:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfee75fb890374a5dbbaa7fecfd2b278 SHA-1: e1677c166380db71bc6d4017d282c339f0601c7e SHA-256: 9cf77c0832e86a918949b3b3af9876e4a5c02c0b3973189d858e2c4f4122406d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.cc'. This redirector is disguised with a query parameter suggesting an 'employee promotion recommendation letter template', indicating a social engineering lure. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=employee+promotion+recommendation+letter+template
    • http://pifuwiw.cotamtb.com/uploads/1/3/1/4/131409090/dodagesa.pdf
    • http://files.dancefoodforthesoul.com/uploads/1/3/0/8/130814297/9dc89fcadac3113.pdf
    • http://files.d2montessori.com/uploads/1/3/1/0/131070911/4837851.pdf
    • http://files.dragonflyspiritualspa.com.au/uploads/1/3/2/6/132695620/a920c9.pdf
    • https://cdn.shopify.com/s/files/1/0436/2623/4009/files/16029369924.pdf
    • https://cdn.shopify.com/s/files/1/0430/7389/6602/files/pifuloteb.pdf
    • https://cdn.shopify.com/s/files/1/0430/3178/9721/files/south_australian_criminal_law_and_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0433/0966/2366/files/95538727796.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9499/files/guzoxojizakuxagone.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/46837313834.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/55001285561.pdf
    • https://cdn.shopify.com/s/files/1/0434/5852/7397/files/52174134017.pdf
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/lisilu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1311/9905/files/adjoint_functors.pdf
    • https://cdn.shopify.com/s/files/1/0438/6678/3904/files/statistical_tests_in_research.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/lerutomajilozazutopaze.pdf
    • https://cdn.shopify.com/s/files/1/0432/5185/9616/files/67586688037.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000089c6.bin
49903ee1b3b5225e0a0523ad7bb51c67bfcbbd017ceb982a8bdfa932df8163b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89C6 14724 bytes
font_01_sfnt_off0000b923.bin
b2eb063a6d5874be9f441da3104dfdb5259364288599a3caaa95c9a5ce42461f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB923 5100 bytes
font_02_sfnt_off0000ca6c.bin
8d1cdfb345919bea13bfa52ad786fdeb8ede5f0104e7a5840c2abc484ceb0e22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6C 13380 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.