Malicious PDF — malware analysis report

Static analysis result for SHA-256 530378927e48fe6e…

MALICIOUS

PDF

44.7 KB Created: 2020-09-04 21:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a97b6642b31ba731cf68ad53ab261287 SHA-1: d23068008ee08bed32f46e50d121e1dabef3c914 SHA-256: 530378927e48fe6ef54c27256aeb3d6325f4533504c2a7c25feadf467fd5f383
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external links, indicating a link farm designed to lure users to malicious infrastructure. The primary malicious URL is https://ttraff.me/wix?keyword=iferror+in+google+sheets, which is likely used to download a second-stage payload or conduct phishing. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=iferror+in+google+sheets
    • https://cdn.shopify.com/s/files/1/0428/7175/0823/files/marketing_strategy_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0430/2602/2554/files/55245926888.pdf
    • https://cdn.shopify.com/s/files/1/0432/9648/9632/files/motuwuwimimitib.pdf
    • https://cdn.shopify.com/s/files/1/0462/5937/2183/files/9_android_tablet_keyboard_case.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2687/files/chegg_ereader_to.pdf
    • https://static.usrfiles.com/ugd/19ce5d_8aa0116439ff4fed9cd57697b3198beb.pdf
    • https://static.usrfiles.com/ugd/40512e_c63ed8a843134977ab37078deae04005.pdf
    • https://cdn.shopify.com/s/files/1/0430/8362/8708/files/bemolesukavenemob.pdf
    • https://cdn.shopify.com/s/files/1/0446/4377/8723/files/17545171099.pdf
    • https://static.usrfiles.com/ugd/e7e4a0_738708dbf4c9438185bc2a84f1df4202.pdf
    • https://static.usrfiles.com/ugd/6cabbb_c968f1907b0b4e748fd67ed526bc0710.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_off00006d28.bin
6bbafd705aaae1201e41fe06a06c708c11e34e7e43264239fb9761f9401b16d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D28 4756 bytes
font_01_sfnt_off00007d57.bin
1a9b1a551940ab32a6b903d539d70474f4fe8fba2782649975209cc7edb4fd38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D57 12728 bytes

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