Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa1242648da1228…

MALICIOUS

PDF

47.8 KB Created: 2020-08-17 10:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b978bea67776b8b79ccd65427406c51c SHA-1: cf90cf46ffdbd6db124116b1f557b4bd0441611b SHA-256: daa1242648da122855ccd1ca83898c025b88bfe0e6c3b900d0560247449e0710
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body, though heavily obfuscated, contains references to URLs that are part of this link farm. The primary attack pattern involves redirecting users to potentially harmful content through this extensive link farm.

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=python+formatting+vscode
    • http://pofezafuz.ordinarymiraclescaninerescue.org/uploads/1/3/2/6/132681218/sizewedokolojive.pdf
    • https://cdn.shopify.com/s/files/1/0428/5680/8615/files/air_vessel_design.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1407/files/bapufevulifen.pdf
    • https://cdn.shopify.com/s/files/1/0435/0319/0181/files/kugozurosur.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2891/files/33174204686.pdf
    • https://cdn.shopify.com/s/files/1/0440/3606/3397/files/69455721822.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/93614116750.pdf
    • https://cdn.shopify.com/s/files/1/0429/6641/7567/files/types_of_enzyme_inhibition_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/dozumavagibuwedagi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1080/8217/files/tahan_kadambari_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/0957/8904/files/building_drawing.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_off0000640e.bin
156c55b0d3a2a890e30210095193dae3aa1c9ab5e8014d4f5ed8575f7f1e6329		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640E 5564 bytes
font_01_sfnt_off000076ca.bin
a77603212c898e2199b088f6b89fe02d6f550dc9d406933824e0435925a4d606		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76CA 11440 bytes
font_02_sfnt_off00009bff.bin
e12927bcd43f280d077d848c6a2458140bd1208675b6924976ed8e54012a164d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BFF 16524 bytes

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