Malicious PDF — malware analysis report

Static analysis result for SHA-256 f05ac259e7e8bcc3…

MALICIOUS

PDF

43.5 KB Created: 2020-09-18 22:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55edc8818f5df2e70ba66ccd26ed797d SHA-1: a8089af834518e4200021cebc8ac8ca684fc57a8 SHA-256: f05ac259e7e8bcc3fd4f39de15ea91f73a11bbd1995e0fe988dd47cf3c38fa29
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a PDF SEO link farm. One of the primary links directs to a known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'number the stars worksheets for teachers' and the malicious URL, suggesting a lure to educational content that leads to malicious sites. No scripts were extracted from this sample.

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=number+the+stars+worksheets+for+teachers
    • http://zefisopas.stocktontrapandskeet.com/uploads/1/3/1/3/131384536/ruzewarifotogajap.pdf
    • http://birav.stonehillcommunity.org/uploads/1/3/2/6/132683014/1041990.pdf
    • http://fosepeju.sheilabycraftjewellery.com/uploads/1/3/2/6/132681647/jerupufakejo-zupekaz.pdf
    • http://files.inwiththeold.co/uploads/1/3/2/7/132741322/8998510.pdf
    • http://files.naturalessentialsmt.com/uploads/1/3/1/4/131453904/d6345b9b6a2f.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/attestation_d_employeur_destine_ple_emploi.pdf
    • https://cdn.shopify.com/s/files/1/0461/4733/8403/files/linkin_park_faint_song.pdf
    • https://cdn.shopify.com/s/files/1/0436/1001/3853/files/autodesk_vault_server_2019.pdf
    • https://cdn.shopify.com/s/files/1/0433/2240/9125/files/lavabepobipozabaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/67994212780.pdf
    • https://cdn.shopify.com/s/files/1/0435/3140/3413/files/kajaria_tiles_catalogue_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5371/1513/files/velodoxosijedajoxobesilaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/marukabexewupul.pdf
    • https://cdn.shopify.com/s/files/1/0432/0650/8701/files/trigger_points_chart.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e07.bin
41d43022385bca27fbe1163ee5419ff7d49101e68a276e674d5bf8cde0f8d72d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E07 5080 bytes
font_01_sfnt_off00006f62.bin
6602af2fb7e277d6c34bb7ed9617d1cf22489024baf062b5fecb12f837514580		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F62 10468 bytes
font_02_sfnt_off000092c8.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92C8 4324 bytes

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