Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b7ebd17e6a2ef32…

MALICIOUS

PDF

58.8 KB Created: 2020-08-29 07:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adc35f46610baa21f71b61d755bc5ac1 SHA-1: 3e4749ea36228a9d40e0286f08bdacdf03e84c34 SHA-256: 4b7ebd17e6a2ef32ebf72baec94ad98390f3b20018b08eb23e5481c47bef434c
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Roblox woodcutting simulator codes' and the malicious URL, suggesting a lure to a scam or phishing site. The ML classifier also strongly flagged this PDF as malicious.

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.com/wix?keyword=roblox+woodcutting+simulator+codes+2
    • https://static.usrfiles.com/ugd/b8c837_d8f53c211b3440dca582c351ccc17b96.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec3edfbd5ac74a0994f2828b8d9f8f64.pdf
    • https://static.usrfiles.com/ugd/b8c837_328de5b8e3a44b4ca8c84bdc11aa823e.pdf
    • https://static.usrfiles.com/ugd/b8c837_57da1a70ffb54bcdb5b94610ada5d0ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_be0ec9187d7547169cc924ad384d5531.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f1c2f6205f14e028ffd4927e95572bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f3c77502bd8481685a7886b86258d2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_b11fb9b6e82542b783bc017fea5d10af.pdf
    • https://static.usrfiles.com/ugd/b8c837_59d6a22c28e24ac4a61b320cde793385.pdf
    • https://static.usrfiles.com/ugd/b8c837_f38a12d1c70e47da99495fcc8a953bd6.pdf
    • https://static.usrfiles.com/ugd/b8c837_79cc6e811873480ca61b1ff00357a0c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee5d07c5b341415f93131826afc6ad34.pdf
    • https://cdn.shopify.com/s/files/1/0465/5418/5878/files/tesoxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6915/3181/files/lodulu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9612/9192/files/pavag.pdf
    • https://cdn.shopify.com/s/files/1/0434/2539/8946/files/xawutug.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056a6.bin
edf517a561ed5132c6c1d5718ac6ff9d870a00e6f43a91762fd168a2279cca75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56A6 6440 bytes
font_01_sfnt_off0000669c.bin
a8444b775188e8a2e6dc0b560600da54ab8a54b9be805c6c7f403f1d6ac5289e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669C 5700 bytes
font_02_sfnt_off000079f5.bin
f4a9896d6de5d94ddff0cb2961dc595cb44a53d2cd9e06e3c1dd28a86789c79f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F5 13340 bytes
font_03_sfnt_off0000a43d.bin
8c43e6c8b1050de2376d26738cd9e064a72264434aa3ee6021fc284739b8c048		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA43D 10420 bytes
font_04_sfnt_off0000c818.bin
c12ec6b22c86a99bd01ec5f0bde7269a61c4dc0adc626f98a4e8e67c21da565b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC818 16148 bytes

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