Malicious PDF — malware analysis report

Static analysis result for SHA-256 fadb179f02b20377…

MALICIOUS

PDF

44.1 KB Created: 2020-07-30 02:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbf8c10923d7f0219d332e0c104ef3af SHA-1: 8a1bb084dec700756bc5020932dc4877c48de33a SHA-256: fadb179f02b203771be6d7aa5d85aa2bcf7ca5b25182e7696fc90bacaab6c360
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing for a PDF link farm. One of the primary links directs to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to merging images into a PDF, suggesting a lure to disguise the malicious intent. The ML classifier also 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.com/wb?keyword=merge%202%20images%20into%20one%20pdf
    • http://files.insulinisgoingdown.com/uploads/1/3/1/4/131406527/fb1ef30ab915.pdf
    • http://files.mogsu.org/uploads/1/3/2/6/132682655/kenimizabuzajedekug.pdf
    • http://files.angeliquelarson.com/uploads/1/3/2/6/132695575/3276a650fbab470.pdf
    • http://files.playmake-believe.com/uploads/1/3/2/7/132741110/9e81adc.pdf
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/25663242275.pdf
    • https://cdn.shopify.com/s/files/1/0432/5143/3627/files/fajadorelivudu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2113/files/zonoxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1778/0896/files/zifododadunu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6091/2537/files/48280351573.pdf
    • https://cdn.shopify.com/s/files/1/0432/7034/0772/files/joridozedopobumelaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/sujogulasigon.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/jarewidatodagexovowabe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3164/1762/files/54413908395.pdf
    • https://cdn.shopify.com/s/files/1/0432/0785/2192/files/zelejegap.pdf
    • https://cdn.shopify.com/s/files/1/0436/4081/5774/files/fufodidobujem.pdf
    • https://cdn.shopify.com/s/files/1/0432/2633/3351/files/76346051753.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1825/files/witabirijakili.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_off00006dd1.bin
04187e1e1f196cdbb8e609d55c620b841f5b563b597cca2d632df68a4c084262		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD1 5252 bytes
font_01_sfnt_off00007f9c.bin
9860b3b782bcf0ae2b2a9b540153f130af83fa009d6dc69b049f29ca5cf949bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9C 10444 bytes

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