Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ad247598c5ddd1d…

MALICIOUS

PDF

47.7 KB Created: 2020-07-31 11:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c5f302caaa6940ac9bda979cbb72057 SHA-1: b78629a6263d538269ee843db820ec6cfadd6fbb SHA-256: 4ad247598c5ddd1dad93a4835d04a072b5e2b6b9a8ed468055fa945e4761d0f0
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a significant portion of which point to a link farm hosted on cdn.shopify.com, designed to redirect users to malicious sites. One such redirector URL is ttraff.com. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly indicate a malicious intent to redirect users to potentially harmful content.

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.com/pify?keyword=archimedes+screw+turbine+pdf
    • http://files.barrons-conferences.com/uploads/1/3/1/4/131409170/3066792.pdf
    • http://files.thehnossaproject.com/uploads/1/3/2/6/132695519/b1beb110c8301b8.pdf
    • http://files.snobz.co/uploads/1/3/1/1/131164211/f64bd17e636.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/52743323201.pdf
    • https://cdn.shopify.com/s/files/1/0432/8099/0366/files/55941628123.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/todidof.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/82709474071.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9571/files/sudiku.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93515438816.pdf
    • https://cdn.shopify.com/s/files/1/0430/9195/1769/files/dajalurekuxuga.pdf
    • https://cdn.shopify.com/s/files/1/0434/5957/5958/files/zenunamosewitisawalu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1954/files/6852347635.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_off00007d9d.bin
6ad6cc119b338265d546d15cb8aa67f586ff283fe5addd09084a5f55b96ccb37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9D 5148 bytes
font_01_sfnt_off00008ef8.bin
92a36d1ec2f22c7298e83bdeb22e473ccb2a5f9a417a4af2739472821ad52923		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF8 10156 bytes

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