Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa456a9d858ff7db…

MALICIOUS

PDF

43.5 KB Created: 2020-08-06 02:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab1f3a41e12ce590b98c598fda62e7b7 SHA-1: c606f3dca059209d404e98df4453b0c04d5ae6dd SHA-256: fa456a9d858ff7db05e5a6be8a1079e7a354f2061230e4c435a1770b9b6d04a2
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a common tactic for SEO manipulation or to host malicious content. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains text related to 'Arduino uno 45 projects' and the redirector URL, suggesting a lure to disguise malicious activity. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly indicate an attempt to lead the user to 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.cc/pify?keyword=arduino+uno+45+projects+for+beginners+and+experts+pdf
    • http://ribiwepov.houstonbottledwater.com/uploads/1/3/1/4/131438641/b43670b16c01055.pdf
    • http://files.alexbenarzi.com/uploads/1/3/1/3/131398507/572c423ba6.pdf
    • http://files.bassriver-nj.org/uploads/1/3/2/6/132682585/didezedoxowu-pinulizawerinox-sabok-xepulo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/duwaxufezemurogagur.pdf
    • https://cdn.shopify.com/s/files/1/0434/1415/9521/files/79795390470.pdf
    • https://cdn.shopify.com/s/files/1/0433/0576/2974/files/fotilukutixuter.pdf
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/zixakorobekizat.pdf
    • https://cdn.shopify.com/s/files/1/0432/4904/1563/files/xafur.pdf
    • https://cdn.shopify.com/s/files/1/0440/9258/8184/files/dexujo.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/68949110611.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99839510681.pdf
    • https://cdn.shopify.com/s/files/1/0432/4527/3251/files/76681410139.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/19719325281.pdf
    • https://cdn.shopify.com/s/files/1/0432/2145/0914/files/libro_aura_descargar.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_off000069d5.bin
9b593bc85a2e6f1575e21849d6e31ef4895696e81fb654e34a59d1e4d92913bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D5 5776 bytes
font_01_sfnt_off00007da9.bin
48c277faf3f593d106af6f8d1e836e498b0e8f8b6a8064a2bf757058867c0800		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA9 10128 bytes

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