Malicious PDF — malware analysis report

Static analysis result for SHA-256 df28af4f39d924d2…

MALICIOUS

PDF

41.0 KB Created: 2020-09-19 01:38:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc2ab10c994baca790a8cd95021e10eb SHA-1: 53e3717ad03a6e8c9570e48e59bf16372203cc47 SHA-256: df28af4f39d924d2fbcd8b79f0ef9e61c50e6910fede6c8a113a728e0addc090
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a search result for 'kingroot apk old version apkpure'. This lure is intended to trick the user into downloading potentially malicious software. The document also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm designed to improve SEO for malicious sites.

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.club/wix?keyword=kingroot+apk+old+version+apkpure
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/tuxizer.pdf
    • https://cdn.shopify.com/s/files/1/0438/5187/4466/files/genazugimozajadiravoxuxab.pdf
    • https://cdn.shopify.com/s/files/1/0438/2782/2749/files/90563171986.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7670/files/purulo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3110/8503/files/94027099171.pdf
    • https://ad14f360-64a4-4744-a5be-c8babf4a7b9e.filesusr.com/ugd/105a8c_d0878f959e554372a71758de6b6abe1f.pdf?index=true
    • https://c9da5205-dbe9-4ca1-9b69-487a45d15f27.filesusr.com/ugd/73c254_1c9b5d72032e4555a479f570c3b98bf7.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/581871399.pdf
    • https://cdn.shopify.com/s/files/1/0432/9593/2574/files/bodhankar_pathophysiology_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/95469577024.pdf
    • https://cdn.shopify.com/s/files/1/0448/4520/3618/files/peramupotut.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_off00006360.bin
e1a601e2fe58c2734b40bfcc386f6752a48d3552ed11c5248c6ded03fdc38715		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6360 5220 bytes
font_01_sfnt_off0000753c.bin
2b2615e3e93cee355ea0eb7c619333b360ff987c77d422fd7e45c1e49ba495a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x753C 10044 bytes

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