Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d8a17aa3cdeb8fb…

MALICIOUS

PDF

51.2 KB Created: 2020-07-31 14:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be92ff00e20f4dcedd92dbca60deafcb SHA-1: 3d33096753d7a175df0da31fb887e09f8a1073f6 SHA-256: 1d8a17aa3cdeb8fb698849db11164cb1815691c76f8cfd69eed4024f58f21fec
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, includes text related to searching for a PDF, suggesting a lure. The presence of a large number of external links, many hosted on Shopify, indicates a link farm designed to attract traffic and potentially distribute malware or phish users.

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.ru/pify?keyword=suddenly+last+summer+full+text+pdf
    • http://files.anabhra.com/uploads/1/3/0/8/130874317/447655.pdf
    • http://files.edusteminitiative.org/uploads/1/3/1/4/131483336/2590755.pdf
    • http://files.slk-photography.com/uploads/1/3/2/6/132695334/00cda464c.pdf
    • http://files.alexanderecology.com/uploads/1/3/0/8/130874647/7820649.pdf
    • http://files.jjartmedia.com/uploads/1/3/1/1/131163854/5168181.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6931/files/daxuvoxesemil.pdf
    • https://cdn.shopify.com/s/files/1/0433/6451/6005/files/labikerimimopemut.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/zafawulukivekuzesidas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9680354999.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9277/files/59850814462.pdf
    • https://cdn.shopify.com/s/files/1/0434/2009/0535/files/zasodaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4703/files/34408520659.pdf
    • https://cdn.shopify.com/s/files/1/0430/5374/4279/files/33121938860.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26450106566.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/57554588833.pdf
    • https://cdn.shopify.com/s/files/1/0433/1982/0446/files/15271887708.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/lufibagek.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/86804751377.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_off00008acb.bin
c4e79c7cfa0aab7f2e14b661ffaed8e0d7d02c75d97e7ba500b8b8b06b2128e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACB 5184 bytes
font_01_sfnt_off00009c53.bin
a40ccbd7583fff563c648cea05467da2abbcb7afae2fb331bfe72d0e8311c054		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C53 10228 bytes

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