Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4249e606b788a21…

MALICIOUS

PDF

40.0 KB Created: 2020-07-09 02:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5ff2c5d4f39d68e4cd89c3b68138f64 SHA-1: b5bcad245e678ca60baca08aebe1fbf964b27c46 SHA-256: d4249e606b788a21d08c3e36351c23c7e06f1eb3dd637ce7b605601782bce885
150 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One prominent link redirects to 'https://ttraff.com/wb?keyword=printable%20math%20worksheets-%20decimal%20multiplication', indicating a likely phishing or malicious redirection attempt disguised as educational material. The PDF structure and extensive link farm suggest a coordinated effort to distribute malicious content.

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/wb?keyword=printable%20math%20worksheets-%20decimal%20multiplication
    • http://files.observationsandconclusions.com/uploads/1/3/0/7/130738708/3033311.pdf
    • http://files.windshieldrepairwoodbridgenj.com/uploads/1/3/0/7/130776481/8501425.pdf
    • http://files.axpcbd.com/uploads/1/3/1/4/131437253/tapesixituraz.pdf
    • http://files.bookcellarlwonline.com/uploads/1/3/1/8/131860787/xejapami.pdf
    • http://files.cliveyou.com/uploads/1/3/1/8/131856331/tegutolej.pdf
    • http://files.peterarmstrong225.net/uploads/1/3/2/8/132815342/dae4c49fd7.pdf
    • http://files.nalinikrishnankutty.com/uploads/1/3/0/8/130874128/mewajuluxojuvafox.pdf
    • http://files.capecommunityorchestra.org/uploads/1/3/1/4/131437454/0d6524e208ea9.pdf
    • https://rebepotare.files.wordpress.com/2020/07/narugufemi.pdf
    • https://zonivip.files.wordpress.com/2020/06/namojebefe.pdf
    • https://xerekewavuzi.files.wordpress.com/2020/06/sukobetim.pdf
    • https://marupuk.files.wordpress.com/2020/06/70105130944.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voriwatovetizejewadodo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tikifulodu.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_off00005f20.bin
82e1ae121898f8de10bbfd10a992707ba9d4222a4d9778a2b183dce252e2daec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F20 5524 bytes
font_01_sfnt_off000071bd.bin
093fa63db381d1dcd6250bf15023b21f9a403735f2470935f4f45a4f13e561bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71BD 9764 bytes

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