Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec839c1ff105f4d5…

MALICIOUS

PDF

51.2 KB Created: 2020-08-23 04:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00d42d596d4fe3bd8b5e817e57cd0778 SHA-1: 319557bf77fb9d589bc3dc6f38bc0f3a7da3bf52 SHA-256: ec839c1ff105f4d52f78f6e78cf7dd492ee3d9c42e84981bbdbf8cf6b4fe681f
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'Belgium visa form pdf' and the malicious URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate destination and potentially improve SEO for malicious 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.cc/pify?keyword=belgium+visa+form+pdf
    • http://files.aliandreali.com/uploads/1/3/1/3/131379939/af0e6b5fd2.pdf
    • https://cdn.shopify.com/s/files/1/0430/7854/9665/files/78651742860.pdf
    • https://cdn.shopify.com/s/files/1/0431/8501/2900/files/accounting_adjusting_entries_examples.pdf
    • https://cdn.shopify.com/s/files/1/0428/3452/6375/files/zegumis.pdf
    • https://cdn.shopify.com/s/files/1/0430/7088/1946/files/36719234409.pdf
    • https://cdn.shopify.com/s/files/1/0439/4595/1400/files/lidewis.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/dafokotoxomoguvozis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/volobufepafolosovi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4528/2214/files/beard_oil_recipe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/98911639783.pdf
    • https://cdn.shopify.com/s/files/1/0438/4866/3200/files/alimak_hoist.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/right_to_equality_article_14_to_18.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_off00008b9a.bin
7c4747621dd7046903403ece8172a348901e4f026cc376decdb191d0894b21a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9A 5472 bytes
font_01_sfnt_off00009e2e.bin
9a8584ad28e420ff94b7cedce1d763b1983aa5a1f7fc31ceead41fd9a59d2020		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E2E 10068 bytes

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