Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47cfb530a5fd531…

MALICIOUS

PDF

48.4 KB Created: 2020-07-09 19:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 937b3154c37c4aab0a835c94df6a4e72 SHA-1: 6e20bf58112ba313b81d2a0b93d3fb085e72a62b SHA-256: d47cfb530a5fd5316663d479f05f2ba2ab6ebb87fb97dd5c4444c8700053eea2
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique commonly used for SEO spam or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, and another indicated a large number of external PDF links, suggesting a link farm. The document body, though partially corrupted, contains a URL that aligns with the observed malicious redirector behavior.

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=secants%20tangents%20and%20angles%20worksheet
    • http://files.3kidsfarmnigis.com/uploads/1/3/0/7/130775940/wogodav.pdf
    • http://files.iseil.org/uploads/1/3/1/3/131380397/fanajijosis.pdf
    • http://files.quiltedpics.com/uploads/1/3/1/3/131381352/vilivibozonom.pdf
    • http://files.mariahhill.com/uploads/1/3/0/7/130740128/4169874.pdf
    • http://files.aleksandragwardiak.com/uploads/1/3/1/0/131070861/balinaz.pdf
    • http://files.advancedanaerobics.com/uploads/1/3/0/9/130969555/davam.pdf
    • http://files.kcpanhel.com/uploads/1/3/2/8/132815961/1055807.pdf
    • http://files.chippewafsc.com/uploads/1/3/1/3/131397934/riwokotowekowewov.pdf
    • https://dunuludujeza.files.wordpress.com/2020/07/luguredisixuvomadijasazen.pdf
    • https://namelivarupe.files.wordpress.com/2020/07/67441469958.pdf
    • https://rejosejel.files.wordpress.com/2020/06/32300518049.pdf
    • https://zarivuj.files.wordpress.com/2020/07/janivupibuzubun.pdf
    • https://vimagifa577894512.files.wordpress.com/2020/06/masejujitizukedopil.pdf
    • https://zugomesemuz.files.wordpress.com/2020/07/42616695866.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4780083199.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sibubemazalomasedexikeme.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pujofupokutesigitugut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruwisosipopiwusanitilowaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1568204463.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wotedosepano.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96226605796.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_off0000732f.bin
94edbc575ee57f06aa28ee44a78ec884a2c773dc28a1226e29fd748a590ebba5
pdf-font-stream PDF embedded font (sfnt) at offset 0x732F 5200 bytes
font_01_sfnt_off000084d9.bin
05247f74d349d64dc56afa04e48aed3d8295e004f7d18e1907e85d92a61be7d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x84D9 15104 bytes