Malicious PDF — malware analysis report

Static analysis result for SHA-256 366bedd4a8c9c8a3…

MALICIOUS

PDF

44.1 KB Created: 2020-08-08 16:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa467ba5df463c8ff7672f9b689bd41c SHA-1: 74df0d9b1c70e9037902830c6363d2eeebf9f0a0 SHA-256: 366bedd4a8c9c8a3f032f9258da4c45548c390c6060f92e34be4990582d47056
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. Another heuristic flags a link to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be the distribution of numerous links, potentially for SEO spam or to lead users to malicious content, rather than direct exploitation within the PDF itself.

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=armiger+warglaive+datasheet+pdf
    • http://files.spjgt.com/uploads/1/3/2/6/132682868/2b95e1635efb4b0.pdf
    • http://files.pcpachicago.com/uploads/1/3/1/4/131454172/givusujabopekexaga.pdf
    • http://davosugef.circleofsage.com/uploads/1/3/1/4/131406082/4475912.pdf
    • http://zolibu.businessprocessassurance.com/uploads/1/3/1/6/131637136/9083499.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/41925776759.pdf
    • https://cdn.shopify.com/s/files/1/0437/1080/8217/files/zuzuba.pdf
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/76980807689.pdf
    • https://cdn.shopify.com/s/files/1/0431/2337/6277/files/faperevukujum.pdf
    • https://cdn.shopify.com/s/files/1/0434/5528/3350/files/23718843432.pdf
    • https://cdn.shopify.com/s/files/1/0447/3529/9738/files/jakedeluroxutanubat.pdf
    • https://cdn.shopify.com/s/files/1/0434/5148/2278/files/womuwabojoxogupizujed.pdf
    • https://cdn.shopify.com/s/files/1/0427/8625/9100/files/719518043.pdf
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/negritude_in_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/base64_decode_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0433/7077/4679/files/krishna_yajur_veda_in_kannada.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_off00006b7f.bin
030aa87f6d53930e7b9fc164d22ce604e325dc9e50f0ba1c469245f340493f35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7F 5596 bytes
font_01_sfnt_off00007e74.bin
30560bf720d0fa38f9e539f6e39e21c9078c1d36d3ac364f6ac1342778cc5563		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E74 11060 bytes

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