Malicious PDF — malware analysis report

Static analysis result for SHA-256 797cd0a50026f145…

MALICIOUS

PDF

38.8 KB Created: 2020-08-16 19:29:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b209991656c3802d26d0a86a1a2e4d43 SHA-1: 116ec4d98d2a8b6285175f8e39d14993e3cd9fee SHA-256: 797cd0a50026f145d6ccbd1945d9cf3c5e6167d44322d4c2a2fd462e7864d947
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many pointing to Shopify domains hosting other PDFs, which is characteristic of a link farm. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=aisatsana+aphex+twin+sheet+music'. This suggests the document's primary purpose is to lure users through these links, likely leading to malicious sites or phishing pages.

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=aisatsana+aphex+twin+sheet+music
    • http://files.bestdayeverevents.nl/uploads/1/3/0/9/130969053/mosanera.pdf
    • http://files.tradewatercandles.com/uploads/1/3/1/4/131438268/de2b8a.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7961/files/nufifa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepikopu.pdf
    • https://cdn.shopify.com/s/files/1/0440/0542/5310/files/62657530136.pdf
    • https://cdn.shopify.com/s/files/1/0429/2686/6599/files/37278903204.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9375/files/francis_carey_organic_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3431/files/kotupifuwevivilexewemasaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9273/files/joputativufej.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9379/files/96790860931.pdf
    • https://cdn.shopify.com/s/files/1/0429/7608/4117/files/baixar_capitaes_de_areia_em_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0428/0690/2950/files/notes_of_chemistry_class_10_chapter_4.pdf
    • https://cdn.shopify.com/s/files/1/0428/6749/0975/files/55826384765.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/fetapatejitulomuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8114/6280/files/14009677504.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_off00004bfb.bin
1c2e6a53a0ffedff211289bb106c22c4c4129a21cefd7d471a322f4f396c1a69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BFB 5196 bytes
font_01_sfnt_off00005d8a.bin
6b287c7c5772db72d27311f1073d01e81987b5cb370c99a2a636cef8d7d17e19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8A 14872 bytes

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