Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c15b0b9b9a0c03a…

MALICIOUS

PDF

39.9 KB Created: 2020-07-10 05:37:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b51d2fe2e2daa054853e36ed59dd019 SHA-1: 4bf4106e7dbcf1d46cf2d7131812006c826d1168 SHA-256: 2c15b0b9b9a0c03a46fd518bbc227706171f6d9cc71ce75f18580edd950920dc
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. The primary link redirects to a URL associated with malicious redirector infrastructure. The document body, while containing educational-sounding text, is primarily a lure to encourage users to click these links, leading to potentially malicious content. 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.ru/wb?keyword=subtracting%20fractions%20with%20unlike%20denominators%20worksheets%20with%20answer%20key
    • http://files.linhr.com/uploads/1/3/1/0/131070189/tabotusatoboza.pdf
    • http://files.neora.ca/uploads/1/3/2/6/132681758/fepuzijonepida-gumulod-fivuzinik.pdf
    • http://files.nickpateras.org/uploads/1/3/2/7/132710655/d914f150ae.pdf
    • http://files.lalookboutique.com/uploads/1/3/2/7/132740398/4d6e735e65.pdf
    • http://files.kitchenkutz.net/uploads/1/3/2/7/132741181/vuzukekaw-boxatulawonekep.pdf
    • http://files.heirlooms.org/uploads/1/3/0/7/130739686/2587f6633b1b6.pdf
    • http://files.aofeathers.com/uploads/1/3/1/3/131398605/sukosagosomuz-rofagidib-nibis.pdf
    • http://files.approachapparel.com/uploads/1/3/1/3/131383664/8009279.pdf
    • https://walumuvov.files.wordpress.com/2020/06/35614988985.pdf
    • https://xuturevum.files.wordpress.com/2020/07/koleduduxigexajoworeguk.pdf
    • https://gefujonusa.files.wordpress.com/2020/06/ruwupuzisobamujojejetimo.pdf
    • https://demolig.files.wordpress.com/2020/07/53289418118.pdf
    • https://powudowipu.files.wordpress.com/2020/06/54549769453.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vexib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87932640634.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rowogumidakedodovejizana.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sibubemazalomasedexikeme.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xatet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82127534182.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_off00005cc0.bin
4ef3c59c01b6cdb705aac0a6e8a3fb4c1216eeb6712d613b5bf5f7cb9063ff98
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC0 5816 bytes
font_01_sfnt_off0000706e.bin
6d2bc8910314d0007a314c166a32728562de3c0d87e6c5b85263a0754fca5710
pdf-font-stream PDF embedded font (sfnt) at offset 0x706E 9772 bytes