Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0638c105f4da8c…

MALICIOUS

PDF

49.0 KB Created: 2020-08-11 23:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6faa5886e7d71b2e2cc5b8441a7747a SHA-1: c56ed7d859f91d9c93aedd4593a2d19c27e100e2 SHA-256: 2f0638c105f4da8c47c66c273910667902097ccea198f1514c1e2b7fd8be9d4a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). This suggests a link farm or redirection tactic to obscure the final malicious destination. The document body, though heavily obfuscated, contains the text 'angles of regular polygons worksheet pdf' and the malicious redirector URL, indicating a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious.

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=angles+of+regular+polygons+worksheet+pdf
    • http://jojenuv.thewanderingweb.com/uploads/1/3/0/7/130775169/rijumanumazeg_nalipoli.pdf
    • http://files.alteredpurposes.com/uploads/1/3/1/4/131437174/cd0596592ad22.pdf
    • http://rokerus.osxnasozi.com/uploads/1/3/2/8/132814742/459436.pdf
    • http://files.faithbiblechurchbellwood.org/uploads/1/3/0/7/130738894/d3ee17d3b7.pdf
    • https://cdn.shopify.com/s/files/1/0428/2246/7740/files/43256043214.pdf
    • https://cdn.shopify.com/s/files/1/0433/5281/7832/files/41819596513.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1702/files/ap_calculus_derivatives_test_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/6613/7507/files/vijelikikiki.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/babikitam.pdf
    • https://cdn.shopify.com/s/files/1/0439/2825/6680/files/47065600078.pdf
    • https://cdn.shopify.com/s/files/1/0440/8829/5576/files/sowufudapojugax.pdf
    • https://cdn.shopify.com/s/files/1/0440/5064/5157/files/fovezaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/8164/5736/files/kotor_2_lightsaber_lens.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3329/files/44616768071.pdf
    • https://cdn.shopify.com/s/files/1/0431/2704/6301/files/dazedugixijebogaripiteda.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/fiwejigonikokenoriz.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_off00007eca.bin
a89ccdd5053e69505c566b043293d34ddd88fa2a2eeaa62242fd8463681bdf0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECA 5552 bytes
font_01_sfnt_off000091c3.bin
82e11adf3205bcd54aca8866a33eb281773474b63fb5caff443acdd673dd2fa9
pdf-font-stream PDF embedded font (sfnt) at offset 0x91C3 10836 bytes