Malicious PDF — malware analysis report

Static analysis result for SHA-256 41d135c231c5bd02…

MALICIOUS

PDF

45.2 KB Created: 2020-09-04 19:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97f885659d4dea30a91175e88c80ba27 SHA-1: ef5e9b014ae8555864fd78b34347e4567715e0ae SHA-256: 41d135c231c5bd02072dbbf341bc23fa84433b8f54e7d5243eaedeab0ea2a8d6
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.me/pify?keyword=american+funds+new+perspective+r6+performance'. Additionally, it exhibits a PDF link farm heuristic, with multiple links hosted on cdn.shopify.com, one of which is 'https://cdn.shopify.com/s/files/1/0427/8665/2316/files/85969658212.pdf'. The ML classifier also flagged this PDF with high confidence. The document body contains garbled text but includes the malicious URL, suggesting a lure to a potentially malicious site.

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.me/pify?keyword=american+funds+new+perspective+r6+performance
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/85969658212.pdf
    • https://cdn.shopify.com/s/files/1/0432/3206/7748/files/iptv_latino_m3u.pdf
    • https://cdn.shopify.com/s/files/1/0430/2821/8010/files/63099672245.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5965/files/66796529912.pdf
    • https://cdn.shopify.com/s/files/1/0433/4567/4389/files/arterial_puncture_for_blood_gas_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0432/8908/4068/files/vavexuguw.pdf
    • https://cdn.shopify.com/s/files/1/0439/0970/9976/files/10900240341.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/8736613660.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4023/files/kevutekowenolorekaxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5796/files/widunebidazozozof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7780/files/8th_grade_earth_science_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6730/files/stefania_gomez_desnuda.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_off000067e3.bin
7faa2701309b64414d0602d9a7f878843c9673ece3cfe21dc08204412c8beddb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E3 5564 bytes
font_01_sfnt_off00007ad2.bin
c31c603491298671ce61009c67583b1680a501f730b3413846afda8399f7f536		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD2 14144 bytes

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