Malicious PDF — malware analysis report

Static analysis result for SHA-256 afce6c37e051dc7f…

MALICIOUS

PDF

60.4 KB Created: 2020-08-22 07:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8aa0e6cc81ac970d05a18b97accb0ba2 SHA-1: ecd63563ee127bad4178647cad73e49a39720413 SHA-256: afce6c37e051dc7ffb5e480d19ad8efbcc5a3a3e181cc96df86572e21200f4f7
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL. The PDF also exhibits characteristics of a link farm, with numerous external links, suggesting an attempt to manipulate search engine results or distribute malicious content. The primary malicious IOC is the redirector URL.

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=what+is+chiari+malformation
    • http://sipoxemuf.abonart.net/uploads/1/3/2/6/132682883/vajuzoja-jukavojomekomi.pdf
    • https://cdn.shopify.com/s/files/1/0448/9995/8939/files/injustice_gods_among_us_hack_android_apk.pdf
    • https://cdn.shopify.com/s/files/1/0439/4447/6840/files/xaxixuporevenunewu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/ganuso.pdf
    • https://cdn.shopify.com/s/files/1/0429/3427/2163/files/cehv8_certified_ethical_hacker_version_8_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0465/9062/3909/files/free_sample_minutes_of_meeting_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/probability_pitman_solution.pdf
    • https://cdn.shopify.com/s/files/1/0439/4611/5230/files/frontier_customer_service_to_report_outage.pdf
    • https://cdn.shopify.com/s/files/1/0431/8917/4432/files/64130362292.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0831/files/38061653674.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/8832057101.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/
    • https://cdn.shopify.com/s/files/1/0429/3427/2163/files/cehv8_certified_ethical_hacker_version_8_study

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af62.bin
f3761b4b7eacd3004f9daf8ab2167d98bfddab94e6a054425371ba49653f975d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF62 5136 bytes
font_01_sfnt_off0000c0bd.bin
d9950d0fd4593d68eb692150673934d8720e94420017ecab07f62db10b22a71d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BD 10624 bytes

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