Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3582224f3f7908…

MALICIOUS

PDF

46.5 KB Created: 2020-08-09 22:18:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a16292ad244e92f1c1cb4649033dcc63 SHA-1: e7e99002a5cd3d3bb0d3cd1cdc883aa2c7010a56 SHA-256: fa3582224f3f79082726d0d5c369969e4050d27b797e88d8083b791ac9c86f97
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the redirector, suggesting a social engineering lure. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the presence of numerous links indicates a delivery mechanism for further malicious content.

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/pify?keyword=michigan+alcohol+screening+test+spanish+version+pdf
    • http://files.picsaacademy.com/uploads/1/3/1/6/131607363/zutewag-niluwap-ravulabunudala-novamesezag.pdf
    • http://files.soashistoryresources.co.uk/uploads/1/3/1/4/131453132/59b61eb41a94f.pdf
    • http://files.dannyandmickey.com/uploads/1/3/2/6/132695416/9539604.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/wolozojuzibakomavoji.pdf
    • https://cdn.shopify.com/s/files/1/0432/1827/2423/files/wisixapunebudeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/6640/8603/files/xomawojelegelok.pdf
    • https://cdn.shopify.com/s/files/1/0435/8239/0431/files/11635770648.pdf
    • https://cdn.shopify.com/s/files/1/0435/3625/3087/files/manual_dexterity_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0431/5961/7690/files/wizurukejidepetajagij.pdf
    • https://cdn.shopify.com/s/files/1/0428/3206/8775/files/22103477193.pdf
    • https://cdn.shopify.com/s/files/1/0447/0145/0396/files/valor_nutricional_de_las_carnes_rojas_y_blancas.pdf
    • https://cdn.shopify.com/s/files/1/0438/5413/5456/files/plural_of_sheep.pdf
    • https://cdn.shopify.com/s/files/1/0431/6079/7333/files/bobcat_331_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pinabazebovo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/96557973384.pdf
    • https://cdn.shopify.com/s/files/1/0437/6916/8021/files/71366514439.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_off00006850.bin
721df6fd1cdf8b69f6e7725cb7d689c5f571b4ecffa81a733837f5095d79e4e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6850 5268 bytes
font_01_sfnt_off00007a3b.bin
d9ca553169e36ef06639cd45de4da451081fafcc232e7a4946984e1cb998a5eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3B 10616 bytes
font_02_sfnt_off00009e5b.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E5B 4324 bytes