Malicious PDF — malware analysis report

Static analysis result for SHA-256 57c7b1f0b022837b…

MALICIOUS

PDF

33.0 KB Created: 2020-08-20 19:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a33c7d78cb45cf8b0b75554bdccafb86 SHA-1: c0bab7a334641fb5dbb10a822c9019da333c3bcd SHA-256: 57c7b1f0b022837bee43f376945b79a9dc15b8253b03494e10925dde73b980e0
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to a URL designed to lure users with 'nutrition information'. This link leads to a known malicious redirector infrastructure. The document also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic to disguise malicious content. No scripts were extracted from this sample.

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=beach+club+jimmy+john%2527+s+nutrition+information
    • http://files.erinnloveshealth.com/uploads/1/3/1/4/131407406/61d36fee.pdf
    • https://cdn.shopify.com/s/files/1/0431/6764/5857/files/kekowapajozokebev.pdf
    • https://cdn.shopify.com/s/files/1/0434/2326/9014/files/validity_and_trustworthiness_in_qualitative_research.pdf
    • https://cdn.shopify.com/s/files/1/0436/4877/8400/files/75638250365.pdf
    • https://cdn.shopify.com/s/files/1/0432/7351/9269/files/pifojemimuru.pdf
    • https://cdn.shopify.com/s/files/1/0437/4459/2021/files/2020_and_2020_calendar_printable.pdf
    • https://cdn.shopify.com/s/files/1/0435/2468/5976/files/warowoboderelitufogupo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/gakifuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/6929/2188/files/beats_x_earphones_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/sinarawul.pdf
    • https://cdn.shopify.com/s/files/1/0436/0405/0084/files/bishop_s_candlesticks_short_script.pdf
    • https://cdn.shopify.com/s/files/1/0434/5770/8193/files/xatube.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_off0000423f.bin
3179f1a3a46dd47dfeaf0c2b6fc1de692cdbbdb3f4dee8dd0c654ecb3e2d83e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x423F 5524 bytes
font_01_sfnt_off000054ef.bin
b37df06bdd2982a296fe04df6913145a5c6c572883b8fef450cc589e06eb0788		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54EF 9560 bytes

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