Malicious PDF — malware analysis report

Static analysis result for SHA-256 584b9ae208fdaeb2…

MALICIOUS

PDF

42.6 KB Created: 2020-07-18 20:25:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b859e201837b3389dd17095f9a478819 SHA-1: f9d094c24ed3ab1065470951c8e55ada7c75f37f SHA-256: 584b9ae208fdaeb20afda8823c6ecb027acb81c67647f497b8bc40cd2c2f8950
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as free educational worksheets. The link leads to a link farm, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=free%20math%20and%20reading%20worksheets%20for%20kindergarten
    • http://files.highlanderfootball.com/uploads/1/3/0/7/130775853/1c11a0d.pdf
    • http://files.vtbtyogafest.com/uploads/1/3/0/7/130775840/dobigovupu_bokapiradida.pdf
    • http://files.hannahtylerdesigns.com/uploads/1/3/1/4/131406234/lipawuvugafogid_sojinizolekedo_jeposonebitiva.pdf
    • http://files.evildragonfiretheater.com/uploads/1/3/0/9/130969424/967e30b25163c.pdf
    • http://files.solomonbrookfarm.ca/uploads/1/3/1/3/131380915/mabululufuril-wosamanitepo-nawujejenukudo.pdf
    • http://files.lodgestmodan985.com/uploads/1/3/0/7/130775806/jiraxebozavo_jubuwomewomofa_kazilanenidipa_nivuki.pdf
    • http://files.threeriversautomodelers.net/uploads/1/3/0/7/130776502/34d52874e5f9a6.pdf
    • https://xazudazeliz.files.wordpress.com/2020/06/77406546526.pdf
    • https://bavewugu.files.wordpress.com/2020/07/supuvosanenesosexepusi.pdf
    • https://filelexasebu.files.wordpress.com/2020/06/89171441652.pdf
    • https://dajajotunur.files.wordpress.com/2020/06/burabod.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/filawotosozukoli.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/20684433651.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/lofabafad.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/87553389812.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3481/files/3442650660.pdf
    • https://cdn.shopify.com/s/files/1/0429/1490/6275/files/xixekunufofarapaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/4956/5853/files/25954435708.pdf
    • https://cdn.shopify.com/s/files/1/0435/5876/4696/files/fokafizerizomazisofawelu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57355052908.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/lorixukinepuko.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_off0000685e.bin
1e04fe38ea26bd155a40abbf661046153bbe31665cd4f4061809c4e61e2945af
pdf-font-stream PDF embedded font (sfnt) at offset 0x685E 5188 bytes
font_01_sfnt_off000079e7.bin
94cb5a48158d78779e14a8251b68150fa51e0cfae2647e55e395fe4785b7765f
pdf-font-stream PDF embedded font (sfnt) at offset 0x79E7 10480 bytes