Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a464f005c2501ca…

MALICIOUS

PDF

53.5 KB Created: 2020-08-24 17:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bcf090b5fee4945e456acd3efe0f63d SHA-1: fc1cab2e83c720c2a53d532d26ebe3e82ce335ce SHA-256: 4a464f005c2501cafc28da1056df36621d5569400b063cbc7d111f57b0808257
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=st+augustine+confessions+pdf'. The document body, though heavily obfuscated, contains references to 'st augustine confessions pdf' and the authoring application 'wkhtmltopdf', suggesting a lure for users searching for this content. The presence of a link farm heuristic further supports the SEO-based lure attack pattern.

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=st+augustine+confessions+pdf
    • http://nepuma.densityanalytics.com/uploads/1/3/2/3/132302978/3123030.pdf
    • http://files.nicolettelynch.com/uploads/1/3/0/7/130775137/3210622.pdf
    • https://cdn.shopify.com/s/files/1/0434/3880/1061/files/jotaguzopovegiteriloputis.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4663/files/77459920402.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/befuxasu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2646/5436/files/91822712004.pdf
    • https://cdn.shopify.com/s/files/1/0428/9658/8967/files/38165988012.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/chikati_gadilo_chithakotudu_telugu_movie_hd.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7335/files/sutemufelumuxetisajir.pdf
    • https://cdn.shopify.com/s/files/1/0455/4794/6149/files/86861072209.pdf
    • https://cdn.shopify.com/s/files/1/0434/1402/8444/files/81786188692.pdf
    • https://cdn.shopify.com/s/files/1/0434/7265/0397/files/kenazuwikodolorarurag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30617095305.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008706.bin
59057cb3a4db197a7526fb41ab976b46fac8b1589c2ff5332c634b3061f42b79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8706 5180 bytes
font_01_sfnt_off000098af.bin
52c90ff293d0626f667b452e3ffff05882e707f9d391d6520d1918e4503239f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98AF 10000 bytes
font_02_sfnt_off0000bae8.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE8 4324 bytes

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