Malicious PDF — malware analysis report

Static analysis result for SHA-256 412cb062e78f7a2d…

MALICIOUS

PDF

47.2 KB Created: 2020-08-04 09:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2319983a2961106fa45c1fe538294f7 SHA-1: 18a21b50523921459378ffbec45a95129fc6d6fe SHA-256: 412cb062e78f7a2da2843eb43cd322a41aea114ea0292569898f6ef87cfc2bf4
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=begrijpend+lezen+groep+7+werkbladen+pdf', is designed to redirect users to malicious content. The PDF also exhibits characteristics of a link farm, embedding numerous external links, many of which point to benign Shopify domains but also include several unknown domains that could host further malicious content. The ML classifier strongly indicated maliciousness.

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.cc/pify?keyword=begrijpend+lezen+groep+7+werkbladen+pdf
    • http://files.loveforellie.com/uploads/1/3/2/8/132815183/c51903fa.pdf
    • http://files.assuringyourcomfort.com/uploads/1/3/2/6/132681342/goxabigoluridu.pdf
    • http://files.jasmineforbuncombe.org/uploads/1/3/1/4/131483955/silemob.pdf
    • https://cdn.shopify.com/s/files/1/0444/4153/4631/files/francis_turbine_working_principle.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53059057271.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/53180492207.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1674/files/94684023887.pdf
    • https://cdn.shopify.com/s/files/1/0441/3505/5512/files/58113388217.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/vowixuwanu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/91874249329.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/fubirapurozi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3949/7112/files/zopeperojakiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/4151/1834/files/74784551842.pdf
    • https://cdn.shopify.com/s/files/1/0440/1466/5878/files/43728100686.pdf
    • https://cdn.shopify.com/s/files/1/0437/4927/7845/files/pewige.pdf
    • https://cdn.shopify.com/s/files/1/0439/9074/5246/files/54934350135.pdf
    • https://cdn.shopify.com/s/files/1/0437/2843/7409/files/5655342512.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_off00006b0c.bin
40cda628272f2e4fae1507463c6bdbe6ac3ab796533c9126292461142dacebb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0C 5292 bytes
font_01_sfnt_off00007d2c.bin
8eb276bbc9f476726ea70cb05a04f5950693e32418a20f7b0e7184a749629e8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2C 10912 bytes
font_02_sfnt_off0000a180.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA180 4324 bytes