Malicious PDF — malware analysis report

Static analysis result for SHA-256 d75a7f80d5ac7588…

MALICIOUS

PDF

43.1 KB Created: 2020-09-16 13:39:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 030a647de619a2d3e96f02c5e16128de SHA-1: 1c6548c179e26d297568deea46e169d07b4bb648 SHA-256: d75a7f80d5ac75881a81d663927e00bbd96baf52782b8a9eefc613723b43c2bd
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a primary malicious redirector URL, designed to lead users to potentially harmful content. The document body, though obfuscated, contains text related to popular search terms, suggesting a tactic to improve search engine ranking and lure unsuspecting users. The ML classifier strongly indicated maliciousness, and the presence of a redirector link confirms a malicious intent to direct users to external, potentially compromised, sites.

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/wix?keyword=dungeons+and+dragons+5th+edition+monster+manual+2
    • http://files.rockymountainprospectors.com/uploads/1/3/1/1/131163898/nugatazagokukiw.pdf
    • http://fefodol.nvintl.com/uploads/1/3/0/8/130814328/89a78942.pdf
    • http://files.rabbisussman.com/uploads/1/3/1/3/131383613/zovifazem.pdf
    • http://files.kimtarrestaurant.com/uploads/1/3/0/7/130776592/85648508a87a23.pdf
    • http://files.sablecatalchemy.com/uploads/1/3/1/6/131606670/resijejorujin-kuturevute-vipoz.pdf
    • http://telosomaj.sdarmuk.org/uploads/1/3/0/8/130813528/vutoniz-mevapiliruv-xaralajibulig-zujolu.pdf
    • http://berepikil.votect2016.org/uploads/1/3/0/8/130814085/1703598.pdf
    • https://cdn.shopify.com/s/files/1/0459/6229/7503/files/39678253893.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/wow_classic_hunter_rotation.pdf
    • https://cdn.shopify.com/s/files/1/0429/3600/8870/files/helm_install_name-_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3112/files/27753983548.pdf
    • https://cdn.shopify.com/s/files/1/0430/4414/3253/files/daconil_fungicide_label.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/79312501461.pdf
    • https://cdn.shopify.com/s/files/1/0432/5208/9000/files/48338375141.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_off000069e0.bin
d8249d1da292274552cb069d50874655b052d4e0a0a64f8522431e7a15f17490		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E0 5496 bytes
font_01_sfnt_off00007c6d.bin
7fa77ddb00758ca9fdf289675bce337327e7059a6e7b111351cae5b75d743c2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6D 10148 bytes

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